Add Gst_plugins_base package (#2811)

* Add Gst_plugins_base package

* Remove redundant dependencies

* Add Gst_plugins_base package

Removed mesa dependency

packages/gst_plugins_base.rb

+require 'package'
+
+class Gst_plugins_base < Package
+  description 'An essential, exemplary set of elements for GStreamer'
+  homepage 'https://gstreamer.freedesktop.org/modules/gst-plugins-base.html'
+  version '1.14.4'
+  source_url 'https://gstreamer.freedesktop.org/src/gst-plugins-base/gst-plugins-base-1.14.4.tar.xz'
+  source_sha256 'ca6139490e48863e7706d870ff4e8ac9f417b56f3b9e4b3ce490c13b09a77461'
+
+  binary_url ({
+     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/gst_plugins_base-1.14.4-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+     x86_64: 'f858e5ccb578bcff6db1cdd143727b8feec5cf153d0b438af4925827e6fabcc1',
+  })
+
+  depends_on 'gstreamer'
+  depends_on 'libtheora'
+  depends_on 'glib'
+  depends_on 'pango'
+  depends_on 'libopus'
+  depends_on 'libogg'
+  depends_on 'libvisual'
+  depends_on 'libpng'
+  depends_on 'graphene'
+  depends_on 'alsa_lib'
+  depends_on 'libxshmfence'
+  depends_on 'libxcomposite'
+  depends_on 'libxv'
+  depends_on 'libglu'
+  depends_on 'libgudev'
+  depends_on 'gdk_pixbuf'
+
+  def self.build
+    system './configure',
+           "--prefix=#{CREW_PREFIX}",
+           "--libdir=#{CREW_LIB_PREFIX}",
+           '--enable-experimental',
+           '--disable-examples'
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+
+  def self.check
+    # system "make", "check" # All the GL tests fail, as an X terminal is not running.
+  end
+end