Regressions on trunk at revision 230910 vs revision 230897

[H.J. Lu Intel64 Core i7]

New failures:

New passes:
FAIL: g++.dg/cpp0x/constexpr-array13.C  -std=c++11  (test for errors, line 6)
FAIL: g++.dg/cpp0x/constexpr-array13.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/cpp0x/constexpr-array13.C  -std=c++14  (test for errors, line 6)
FAIL: g++.dg/cpp0x/constexpr-array13.C  -std=c++14 (test for excess errors)