sys-devel/gcc: 9.2.0: cut 4 patchset

sys-devel/gcc: 9.2.0: cut 4 patchset

4 new patches:
- 27_all_sparc-PIC-constant-PR91472.patch: fix PIC register alocation
  (bug detected by gmp test suite)
- 31_all_openmp-for-SEGV.patch: fix opemnmp for loop condition folding
- 32_all_sparc-PIC-constant-part2.patch: fix PIC register allocation
  (bug detected by python regressin)
- 33_all_extend-lifetime.patch: fix lifetime extension on ':?' operator
  (bug detected by firefox LTO build

Bug: https://gcc.gnu.org/PR91472
Bug: https://bugs.gentoo.org/699938
Bug: https://gcc.gnu.org/PR92504
Bug: https://bugs.gentoo.org/697708
Bug: https://gcc.gnu.org/PR92095
Bug: https://bugs.gentoo.org/701866
Bug: https://gcc.gnu.org/PR92831
Package-Manager: Portage-2.3.82, Repoman-2.3.20
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>