Regressions on trunk at revision 178608 vs revision 178602

[H.J. Lu Intel64 LTO/FDO]

New failures:

New passes:
FAIL: 20_util/tuple/moveable2.cc (test for excess errors)
FAIL: 20_util/tuple/moveable2.cc (test for excess errors)
FAIL: g++.dg/cpp0x/regress/abi-empty7.C (test for excess errors)