gnu: gst-plugins-good: Disable rtprtx tests that frequently fail.

* gnu/packages/gstreamer.scm (arguments): Add 'disable-failing-rtprtx-tests'
  phase.

gnu/packages/gstreamer.scm

@@ -222,6 +222,19 @@ for the GStreamer multimedia library.")
      `(("glib:bin" ,glib "bin")
        ("pkg-config" ,pkg-config)
        ("python-wrapper" ,python-wrapper)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after
+          'unpack 'disable-failing-rtprtx-tests
+          (lambda _
+            ;; Disable rtprtx tests that frequently fail.
+            ;; XXX FIXME: Try removing this for version > 1.4.5.
+            (substitute* "tests/check/elements/rtprtx.c"
+              (("tcase_add_test \\(tc_chain,\
+ (test_rtxsender_max_size_packets|test_rtxreceive_data_reconstruction)\\);" all)
+               (string-append "/* " all " */")))
+            #t)))))
     (home-page "http://gstreamer.freedesktop.org/")
     (synopsis
      "Plugins for the GStreamer multimedia library")