xulrunner 2.0 in rawhide (F15) bundles several system libs

[Takanori MATSUURA]

Hi Chen,

For modules/libimg/png, mozilla products use aPNG which was rejected
by upstream.
http://en.wikipedia.org/wiki/APNG

So we have to use internal png.


For media/libvorbis, mozilla has custom patches in the source tree.
https://bugzilla.mozilla.org/show_bug.cgi?id=517422


Fro media/libvpx, I don't know well. However you are welcome to file
the issue to bugzilla.mozilla.org.


Takanori