sys-devel/gcc: cut 1.4 patchset for 4.6.4

sys-devel/gcc: cut 1.4 patchset for 4.6.4

Two new patches and four removals:
- 10_all_default-fortify-source.patch
- 11_all_gcc-default-format-security.patch
- 12_all_default-warn-trampolines.patch
+ 34_all_libjava-classpath-locale-sort.patch
  fix sortting on cs_CZ locale
- 99_all_testsuite-01-Wformat.patch
+ 94_all_ucontext-to-ucontext_t.patch
  fix build failure against glibc-2.28

Bug: https://bugs.gentoo.org/563710
Bug: https://bugs.gentoo.org/629502
Package-Manager: Portage-2.3.49, Repoman-2.3.11