Regressions on trunk at revision 209800 vs revision 209774

[H.J. Lu ia32 Core i7]

New failures:
FAIL: gcc.dg/pr18079-2.c (test for excess errors)
FAIL: gcc.dg/pr18079-2.c  (test for warnings, line 13)
FAIL: gcc.dg/pr18079-2.c  (test for warnings, line 16)
FAIL: gcc.dg/pr18079-2.c  (test for warnings, line 6)
FAIL: gcc.dg/pr18079-2.c  (test for warnings, line 9)

New passes:
FAIL: libstdc++-abi/abi_check