sys-devel/gcc: cut 1.8 patchset for 6.4.0

sys-devel/gcc: cut 1.8 patchset for 6.4.0

Eight new patches:
+ 103_all_remove-lieee.patch:
  drop assumed -lieee from -mieee-fp
+ 104_all_libgfortran-Werror.patch:
+ 105_all_libgomp-Werror.patch
+ 106_all_libitm-Werror.patch
+ 107_all_libatomic-Werror.patch
+ 108_all_libbacktrace-Werror.patch
+ 109_all_libsanitizer-libbacktrace-Werror.patch:
  pull in all -Werror patches from 8.2.0
+ 110_all_libstdcxx-no-vtv.patch:
  drop libvtv RPATH from libstdc++

Bug: https://bugs.gentoo.org/667104
Bug: https://bugs.gentoo.org/475350
Bug: https://bugs.gentoo.org/229059
Bug: http://gcc.gnu.org/PR38436
Bug: https://bugs.gentoo.org/433435
Bug: http://gcc.gnu.org/PR54724
Bug: https://bugs.gentoo.org/582524
Bug: https://gcc.gnu.org/PR85884
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Package-Manager: Portage-2.3.51, Repoman-2.3.11