- drop nss-linux-x86-patch.0:
  this was actually patching OS/2-specific code so is evidently obsolete
- drop nspr-build-config.patch:
  there does not appear to be any justification why this huge patch exists
  at all, so the only reasonable thing to do is to drop it
- nss_macosx.patch:
  drop several hunks relevant only to unuspported MacOSX/PPC platform

Change-Id: Id55fcb8eaa637c10a42203f1897480df8a6ec0fa