Regressions on trunk at revision 200168 vs revision 200165

[Kirill Yukhin [Intel32 Core AVX-i]]

New failures:

New passes:
FAIL: gcc.dg/c90-fordecl-1.c (test for excess errors)
FAIL: gcc.dg/c90-fordecl-1.c declaration in for loop (test for errors, line 10)
FAIL: gcc.dg/c90-fordecl-1.c note (test for warnings, line 10)