- attempt to fix pgo hanging with gcc with exporting
MOZ_REMOTE_SETTINGS_DEVTOOLS=1,
- bump cbindgen requirement to 0.29.1,
- bump nspr requirement to 4.38,
- bump nss requirement to 3.118,
- drop disable-warnings-as-errors.patch completely in an attempt to find out
if it's already obsolete by upstream build system,
- rebase bgo-910309-dont-link-widevineplugin-to-libgcc_s.patch,
- remove <ffmpeg-8 restriction as upstream has merged ffmpeg-8 support.
Bug: https://bugs.gentoo.org/966309
Bug: https://bugs.gentoo.org/962454
Bug: https://bugs.gentoo.org/966424
Signed-off-by: Joonas Niilola <juippis@gentoo.org>