Sync with GCC
2020-05-15 H.J. Lu <hongjiu.lu@intel.com>
PR bootstrap/95147
* cet.m4 (GCC_CET_FLAGS): Also check if -fcf-protection works
when defaulting to auto.
2020-05-14 H.J. Lu <hongjiu.lu@intel.com>
* cet.m4 (GCC_CET_FLAGS): Change default to auto.