gnu: ams-lv2: Update to 1.2.2.

This is the same commit, now with a version number.

* gnu/packages/music.scm (ams-lv2): Update to 1.2.2.
[home-page]: Replace with a working one.

gnu/packages/music.scm

@@ -2383,24 +2383,18 @@ follows a traditional multi-track tape recorder control paradigm.")
     (license license:gpl2+)))
 
 (define-public ams-lv2
-  ;; Version 1.2.1 built with Python 3.7 raises an error in the waf-script.
-  ;; Therefore, we take two more commmits than 1.2.1 that introduce an updated
-  ;; waf-script and fix one error.
-  (let ((commit "377d166db54a787b48979171c5652d2eb4f1bbb5")
-        (revision "1"))
   (package
     (name "ams-lv2")
-      (version (git-version "1.2.1" revision commit))
+    (version "1.2.2")
     (source
      (origin
        (method git-fetch)
        (uri (git-reference
              (url "https://github.com/blablack/ams-lv2.git")
-               (commit commit)))
+             (commit (string-append "v" version))))
        (file-name (git-file-name name version))
        (sha256
-          (base32
-           "1ndgxcxjxwidg7436k0nb5clxkyi878k1j999sbbd1gk2fm0kcqm"))))
+        (base32 "1lz2mvk4gqsyf92yxd3aaldx0d0qi28h4rnnvsaz4ls0ccqm80nk"))))
     (build-system waf-build-system)
     (arguments
      `(#:phases
@@ -2414,21 +2408,21 @@ follows a traditional multi-track tape recorder control paradigm.")
              #t)))
        #:tests? #f))                    ; no tests
     (inputs
-       `(("lv2" ,lv2)
-         ("lvtk" ,lvtk)
-         ("gtkmm" ,gtkmm-2)
+     `(("cairo" ,cairo)
+       ("fftw" ,fftw)
        ("gtk" ,gtk+-2)
-         ("cairo" ,cairo)
-         ("fftw" ,fftw)))
+       ("gtkmm" ,gtkmm-2)
+       ("lv2" ,lv2)
+       ("lvtk" ,lvtk)))
     (native-inputs
      `(("pkg-config" ,pkg-config)))
-      (home-page "https://objectivewave.wordpress.com/ams-lv2/")
+    (home-page "https://github.com/blablack/ams-lv2")
     (synopsis "Port of Alsa Modular Synth internal modules into LV2")
     (description "This set of LV2 plugins is a port of the internal modules
 found in Alsa Modular Synth.  These plugins are used to create modular
 synthesizers and contain: VCO, VCF, VCA, LFO, slew limiter, envelopes, sample
 and hold, etc.")
-      (license license:gpl2))))
+    (license license:gpl2)))
 
 (define-public gxtuner
   (package