Regressions on trunk at revision 205727 vs revision 205701

[H.J. Lu Intel64]

New failures:
FAIL: 17_intro/headers/c++200x/stdc++.cc (test for excess errors)
FAIL: 17_intro/headers/c++200x/stdc++_multiple_inclusion.cc (test for excess errors)
FAIL: gcc.dg/vect/vect-nop-move.c execution test

New passes:
FAIL: g++.dg/warn/pr15774-1.C -std=c++11  (test for errors, line 3)
FAIL: g++.dg/warn/pr15774-1.C -std=c++98  (test for errors, line 3)