gnu: Fix uses of deprecated chez-scheme-for-system.

(chez-srfi, chez-web, chez-sockets, chez-matchable, chez-irregex)
(chez-fmt, chez-mit, chez-scmutils)[native-inputs]: Use 'chez-scheme'
instead of 'chez-scheme-for-system'.
* gnu/packages/emacs-xyz.scm (emacs-geiser-chez)[inputs]: Likewise.
* gnu/packages/loko.scm (loko-scheme)[native-inputs]: Likewise.

Change-Id: Ib4d713fecbb41cbbe75f67980b9e22cc9bd673dd
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/chez.scm

@@ -907,7 +907,7 @@ create compilers, making them easier to understand and maintain.")
        (file-name (git-file-name name version))))
     (build-system gnu-build-system)
     (native-inputs
-     (list (chez-scheme-for-system)))
+     (list chez-scheme))
     (arguments
      (list #:make-flags (chez-make-flags name version)
            #:test-target "test"
@@ -938,7 +938,7 @@ create compilers, making them easier to understand and maintain.")
           (base32 "1dq25qygyncbfq4kwwqqgyyakfqjwhp5q23vrf3bff1p66nyfl3b"))))
       (build-system gnu-build-system)
       (native-inputs
-       (list (chez-scheme-for-system)
+       (list chez-scheme
              ghostscript
              (texlive-updmap.cfg
               (list texlive-charter
@@ -1005,7 +1005,7 @@ programming in Scheme.")
           (base32 "1n5fbwwz51fdzvjackgmnsgh363g9inyxv7kmzi0469cwavwcx5m"))))
       (build-system gnu-build-system)
       (native-inputs
-       (list (chez-scheme-for-system)
+       (list chez-scheme
              chez-web
              (texlive-updmap.cfg)))
       (arguments
@@ -1091,7 +1091,7 @@ Chez Scheme.")
     (inputs
      (list chez-srfi)) ; for tests
     (native-inputs
-     (list (chez-scheme-for-system)))
+     (list chez-scheme))
     (arguments
      (list #:make-flags (chez-make-flags name version)
            #:test-target "test"
@@ -1123,7 +1123,7 @@ Chez Scheme.")
     (propagated-inputs
      (list chez-srfi)) ; for irregex-utils
     (native-inputs
-     (list (chez-scheme-for-system)))
+     (list chez-scheme))
     (arguments
      (list #:make-flags (chez-make-flags name version)
            #:test-target "test"
@@ -1154,7 +1154,7 @@ syntax, with various aliases for commonly used patterns.")
     (propagated-inputs
      (list chez-srfi)) ; for irregex-utils
     (native-inputs
-     (list (chez-scheme-for-system)))
+     (list chez-scheme))
     (arguments
      (list #:make-flags (chez-make-flags name version)
            #:test-target "chez-check"
@@ -1217,7 +1217,7 @@ strings.")
     (inputs
      (list chez-srfi))       ; for tests
     (native-inputs
-     (list (chez-scheme-for-system)))
+     (list chez-scheme))
     (arguments
      (list #:make-flags (chez-make-flags name version)
            #:test-target "test"
@@ -1248,7 +1248,7 @@ required to port the program @code{Scmutils} to Chez Scheme.")
     (inputs
      (list chez-srfi))       ; for tests
     (native-inputs
-     (list (chez-scheme-for-system)))
+     (list chez-scheme))
     (propagated-inputs
      (list chez-mit chez-srfi))
     (arguments

gnu/packages/emacs-xyz.scm

@@ -762,7 +762,7 @@ a generic Scheme interaction mode for the GNU Emacs editor.")
                 (string-append
                  "(eval-after-load 'geiser-impl '" all ")"))))))))
     (inputs
-     (list (chez-scheme-for-system)))
+     (list chez-scheme))
     (propagated-inputs
      (list emacs-geiser))
     (home-page "https://nongnu.org/geiser/")

gnu/packages/loko.scm

@@ -74,7 +74,7 @@
               #t)))))
     (native-inputs
      (list akku
-           (chez-scheme-for-system)
+           chez-scheme
            guile-struct-pack
            guile-laesare
            guile-pfds