gnu: terminals: Change libtsm and kmscon repositories.

Those two packages (from the same author) are no longer maintained and do not
even compile. Switch to a fork that is maintained even if it does not have any
release yet.

* gnu/packages/terminals.scm (libtsm)[origin]: Use
"https://github.com/Aetf/libtsm" as new origin and switch to git-fetch method.
(kmscon)[origin]: Use "https://github.com/Aetf/kmscon" as new origin and
switch to git-fetch method.

gnu/packages/terminals.scm

@@ -187,22 +187,28 @@ text-based approach to terminal recording.")
     (license license:gpl3)))
 
 (define-public libtsm
+  (let ((commit "f70e37982f382b03c6939dac3d5f814450bda253")
+        (revision "1"))
     (package
       (name "libtsm")
-    (version "3")
+      (version (git-version "0.0.0" revision commit))
       (source (origin
-              (method url-fetch)
-              (uri (string-append
-                    "https://freedesktop.org/software/kmscon/releases/"
-                    "libtsm-" version ".tar.xz"))
+                (method git-fetch)
+                ;; The freedesktop repository is no longer maintained.
+                (uri (git-reference
+                      (url (string-append "https://github.com/Aetf/" name))
+                      (commit commit)))
                 (sha256
                  (base32
-                "01ygwrsxfii0pngfikgqsb4fxp8n1bbs47l7hck81h9b9bc1ah8i"))))
-    (build-system gnu-build-system)
+                  "0mwn91i5h5d518i1s05y7hzv6bc13vzcvxszpfh77473iwg4wprx"))))
+      (build-system cmake-build-system)
+      (arguments
+       `(#:configure-flags '("-DBUILD_TESTING=ON")))
       (native-inputs
        `(("pkg-config" ,pkg-config)))
       (inputs
-     `(("libxkbcommon" ,libxkbcommon)))
+       `(("libxkbcommon" ,libxkbcommon)
+         ("check" ,check)))
       (synopsis "Xterm state machine library")
       (description "TSM is a state machine for DEC VT100-VT520 compatible
 terminal emulators.  It tries to support all common standards while keeping
@@ -213,24 +219,33 @@ compatibility to existing emulators like xterm, gnome-terminal, konsole, etc.")
       ;; derived from ISC.
       ;; UCS-4 to UTF-8 encoding is copied from "terminology" which is released
       ;; under the bsd 2 license.
-    (license (list license:expat license:lgpl2.1+ license:isc license:bsd-2))))
+      (license (list license:expat license:lgpl2.1+ license:isc license:bsd-2)))))
 
 (define-public kmscon
+  (let ((commit "01dd0a231e2125a40ceba5f59fd945ff29bf2cdc")
+        (revision "1"))
     (package
       (name "kmscon")
-    (version "8")
+      (version (git-version "0.0.0" revision commit))
       (source (origin
-              (method url-fetch)
-              (uri (string-append
-                    "https://freedesktop.org/software/kmscon/releases/"
-                    "kmscon-" version ".tar.xz"))
+                (method git-fetch)
+                ;; The freedesktop repository is no longer maintained.
+                (uri (git-reference
+                      (url (string-append "https://github.com/Aetf/" name))
+                      (commit commit)))
                 (sha256
                  (base32
-                "0axfwrp3c8f4gb67ap2sqnkn75idpiw09s35wwn6kgagvhf1rc0a"))
-              (modules '((guix build utils)))
-              (snippet
+                  "0q62kjsvy2iwy8adfiygx2bfwlh83rphgxbis95ycspqidg9py87"))
+                (modules '((guix build utils)))))
+      (build-system gnu-build-system)
+      (arguments
+       `(#:phases (modify-phases %standard-phases
+                    (add-after 'unpack 'autogen.sh
+                      (lambda _
+                        (zero? (system* "sh" "autogen.sh"))))
                     ;; Use elogind instead of systemd.
-               '(begin
+                    (add-before 'configure 'remove-systemd
+                      (lambda _
                         (substitute* "configure"
                           (("libsystemd-daemon libsystemd-login")
                            "libelogind"))
@@ -242,11 +257,12 @@ compatibility to existing emulators like xterm, gnome-terminal, konsole, etc.")
                            "")
                           ;; Replace the call to 'sd_booted' by the truth value.
                           (("sd_booted\\(\\)")
-                     "1"))
-                  #t))))
-    (build-system gnu-build-system)
+                           "1")))))))
       (native-inputs
        `(("pkg-config" ,pkg-config)
+         ("autoconf" ,autoconf)
+         ("automake" ,automake)
+         ("libtool" ,libtool)
          ("libxslt" ,libxslt)                       ;to build the man page
          ("libxml2" ,libxml2)                       ;for XML_CATALOG_FILES
          ("docbook-xsl" ,docbook-xsl)))
@@ -276,7 +292,7 @@ multi-seat support, a replacement for @command{mingetty}, and more.")
       (license (list license:expat license:lgpl2.1+ license:bsd-2
                      license:gpl2+))
       (supported-systems (filter (cut string-suffix? "-linux" <>)
-                               %supported-systems))))
+                                 %supported-systems)))))
 
 (define-public libtermkey
   (package