Regressions on trunk at revision 219633 vs revision 219632

[i64corei7avx512@ecsmtp.ims.intel.com]

New failures:
ERROR: (DejaGnu) proc "libatomic_target_compile lto4028.c lto4028.o object additional_flags=-flto" does not exist.

New passes:
ERROR: (DejaGnu) proc "libatomic_target_compile lto30606.c lto30606.o object additional_flags=-flto" does not exist.