Regressions on trunk at revision 259628 vs revision 259592

[H.J. Lu ia32 Core i7]

New failures:

New passes:
FAIL: c-c++-common/attr-aligned-1.c  -std=c++11 (test for excess errors)
FAIL: c-c++-common/attr-aligned-1.c  -std=c++14 (test for excess errors)
FAIL: g++.dg/cpp0x/alignas4.C  -std=c++11  scan-assembler align 8
FAIL: g++.dg/cpp0x/alignas4.C  -std=c++14  scan-assembler align 8