Update to GCC 6.3.0 + fix for PR80180

New upstream release, fiddle patches to apply on it.
Also apply upstream fix for rdseed/rdrand intrinsics code
generation (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180).

Change-Id: Ib4dec62b4c7a537220e8755a2bc9a6a11181e000
2 files changed