firefox: preliminary 32-bit ppc fixes
firefox: preliminary 32-bit ppc fixes

The xptcall code needs to be fixed for this to build and work.
This for now adds some preliminary changes to allow the rest of
it to build.

necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages