Add gas-preprocessor.pl as a git submodule, and put it in the
path so that it is available if libav wants it.
Switch back to providing $CC as $AS by default, but
respect an external $AS setting so that it can be
overridden in cerbero
https://bugzilla.gnome.org/show_bug.cgi?id=694416
ffmpeg seems to be the one of the two forks, which is most widely used by
Linux distributions and in general. Also Google is using it for e.g. Chrome
and has engineers working on finding and fixing security issues in it.
https://bugzilla.gnome.org/show_bug.cgi?id=751607
Original commit message from CVS:
* removal of //-style comments
* don't link plugins to core libs -- the versioning is done internally to the plugins with the plugin_info struct,
and symbol resolution is lazy, so we can always know if a plugin can be loaded by the plugin_info data. in theory.
