Regressions on trunk at revision 206040 vs revision 206039

[H.J. Lu ia32]

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)

New passes:
FAIL: c-c++-common/ubsan/overflow-2.c  -O1  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O1  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O1  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O1  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O2  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O2  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O2  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O2  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -fomit-frame-pointer  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -fomit-frame-pointer  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -g  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -g  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -g  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -g  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -Os  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -Os  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -Os  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -Os  (test for excess errors)