Regressions on trunk at revision 206209 vs revision 206199

[H.J. Lu x32]

New failures:

New passes:
FAIL: g++.dg/ext/mv1.C -std=gnu++11 (test for excess errors)
FAIL: g++.dg/ext/mv1.C -std=gnu++98 (test for excess errors)
FAIL: g++.dg/ext/pr57548.C -std=c++11 (test for excess errors)
FAIL: g++.dg/ext/pr57548.C -std=c++98 (test for excess errors)