gstreamer: add linbice dependency

This enables the nice plugins and also adds the webrtcbin plugins from
gst-plugins-bad.

Note, that this is different from the disabled libnice subproject. The
subproject clones libnice and try to install it in the system, which we don't
want. In contrast, adding the dependency just allows plugins to depend on the
system installed one.

Author: aconchillo

Formula/g/gstreamer.rb

@@ -2,6 +2,7 @@ class Gstreamer < Formula
   desc "Development framework for multimedia applications"
   homepage "https://gstreamer.freedesktop.org/"
   license all_of: ["LGPL-2.0-or-later", "LGPL-2.1-or-later", "MIT"]
+  revision 1
 
   stable do
     url "https://gitlab.freedesktop.org/gstreamer/gstreamer/-/archive/1.22.9/gstreamer-1.22.9.tar.gz"
@@ -62,6 +63,7 @@ class Gstreamer < Formula
   depends_on "jpeg-turbo"
   depends_on "json-glib"
   depends_on "lame"
+  depends_on "libnice"
   depends_on "libogg"
   depends_on "libpng"
   depends_on "libpthread-stubs"
@@ -202,6 +204,11 @@ def install
   def caveats
     <<~EOS
       All gst-* GStreamer plugins are now bundled in this formula.
+
+      GStreamer plugins are located in `#{HOMEBREW_PREFIX}/lib/gstreamer-1.0`
+      and `GST_PLUGIN_SYSTEM_PATH` needs to be set accordingly:
+        export GST_PLUGIN_SYSTEM_PATH="#{HOMEBREW_PREFIX}/lib/gstreamer-1.0"
+
       For GStreamer to find your own plugins, add their paths to `GST_PLUGIN_PATH`.
       For example, if you have plugins in `~/.local/lib/gstreamer-1.0`:
         export GST_PLUGIN_PATH="~/.local/lib/gstreamer-1.0"