- updated to 0.5.0 (note: new soname)

- updated to 0.5.0 (note: new soname)
- updated amr,flags,install-is-not-clean,xulrunner patches
- removed obsolete ffmpeg,libpng,240_all_libpng15.patch,250_all_openjpeg14,
  260_all_ffmpeg_bump,270_all_ffmpeg_trunk patches
- dropped outdated pic patch (--enable-pic uses -fPIC everywhere now, bleh :/)
- added apps,export,js patches

Changed files:
    240_all_libpng15.patch -> 1.2
    250_all_openjpeg14.patch -> 1.2
    260_all_ffmpeg_bump.patch -> 1.2
    270_all_ffmpeg_trunk.patch -> 1.2
    gpac-amr.patch -> 1.2
    gpac-apps.patch -> 1.1
    gpac-export.patch -> 1.1
    gpac-ffmpeg.patch -> 1.2
    gpac-flags.patch -> 1.3
    gpac-install-is-not-clean.patch -> 1.2
    gpac-js.patch -> 1.1
    gpac-libpng.patch -> 1.2
    gpac-pic.patch -> 1.2
    gpac-xulrunner.patch -> 1.6
    gpac.spec -> 1.54