Regressions on trunk at revision 212195 vs revision 212186

[H.J. Lu ia32 Core i7]

New failures:

New passes:
ERROR: g++.dg/cpp1y/pr59867.C -std=c++11: syntax error in target selector "target c++14" for " dg-do 2 compile { target c++14 } "
ERROR: g++.dg/cpp1y/pr59867.C -std=c++1y: syntax error in target selector "target c++14" for " dg-do 2 compile { target c++14 } "
ERROR: g++.dg/cpp1y/pr59867.C -std=c++98: syntax error in target selector "target c++14" for " dg-do 2 compile { target c++14 } "