gnu: ardour: Update to 8.4.

* gnu/packages/audio.scm (ardour): Update to 8.4.
[arguments]: Do not use bundled GTK2.

Co-authored-by: Apoorv.
Change-Id: I7c50ca8df14d2edec8bd9e862cb05dd455913b60

gnu/packages/audio.scm

@@ -774,7 +774,7 @@ purposes developed at Queen Mary, University of London.")
 (define-public ardour
   (package
     (name "ardour")
-    (version "8.0")
+    (version "8.4")
     (source (origin
               (method git-fetch)
               (uri (git-reference
@@ -791,7 +791,7 @@ purposes developed at Queen Mary, University of London.")
 namespace ARDOUR { const char* revision = \"" version "\" ; const char* date = \"\"; }")))))
               (sha256
                (base32
-                "1a2dbysd64njiw087ypkwlvr31qz3dvfaca55nq2bc4fmm71mgv4"))
+                "17gh1yaaby17zwx43h5v8dsrcznks9pn8jddc3wadq13b5x7zb7a"))
               (file-name (string-append name "-" version))))
     (build-system waf-build-system)
     (arguments
@@ -800,6 +800,7 @@ namespace ARDOUR { const char* revision = \"" version "\" ; const char* date = \
       '(list "--cxx11"                  ;required by gtkmm
              "--optimize"
              "--no-phone-home"          ;don't contact ardour.org
+             "--no-ytk"                 ;don't use bundled GTK2
              "--freedesktop"            ;build .desktop file
              "--test"                   ;build unit tests
              "--use-external-libs")     ;use system libraries