gst-plugins-bad: add gnutls option.

- This allows HLS elements within the fragmented plugin to be built.

Closes Homebrew/homebrew#26432.
Closes Homebrew/homebrew#26426.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/gst-plugins-bad.rb

@@ -21,6 +21,7 @@ class GstPluginsBad < Formula
   depends_on 'dirac' => :optional
   depends_on 'faac' => :optional
   depends_on 'faad2' => :optional
+  depends_on 'gnutls' => :optional
   depends_on 'libdvdread' => :optional
   depends_on 'libexif' => :optional
   depends_on 'libmms' => :optional