firefox: bump to 29.0.1

webm is enabled for the moment, until
https://bugzilla.mozilla.org/show_bug.cgi?id=1008871 is fixed.
this pulls in yasm, libogg, libvorbis
and enables the build time options webm, ogg, and opus which all
depend on each other.

there's a new bug in the configure script, for which a patch was added.
https://bugzilla.mozilla.org/show_bug.cgi?id=1008851
gdb76: add patch for build error without bash

addresses #198

patch from
http://git.proteanos.com/pkg/gdb.git/tree/patches/02_fix-opcodes-configure-bfd-version-on-busybox-ash.patch
gdb: default to gdb76
binutils: fix build error when bash is not installed

closes #198