Regressions on trunk at revision 236685 vs revision 236646

[Intel Automatic Testing System [ia32 Core AVX2]]

New failures:
FAIL: ext/profile/mutex_extensions_neg.cc  (test for errors, line 324)
FAIL: ext/profile/mutex_extensions_neg.cc (test for excess errors)

New passes:
ERROR: g++.dg/cpp1y/lambda-generic-static1.C  -std=c++11: syntax error in target selector "target c++1y" for " dg-do 2 run { target c++1y } "
ERROR: g++.dg/cpp1y/lambda-generic-static1.C  -std=c++14: syntax error in target selector "target c++1y" for " dg-do 2 run { target c++1y } "
ERROR: g++.dg/cpp1y/lambda-generic-static1.C  -std=c++98: syntax error in target selector "target c++1y" for " dg-do 2 run { target c++1y } "
ERROR: g++.dg/cpp1y/lambda-generic-static2.C  -std=c++11: syntax error in target selector "target c++1y" for " dg-do 2 run { target c++1y } "
ERROR: g++.dg/cpp1y/lambda-generic-static2.C  -std=c++14: syntax error in target selector "target c++1y" for " dg-do 2 run { target c++1y } "
ERROR: g++.dg/cpp1y/lambda-generic-static2.C  -std=c++98: syntax error in target selector "target c++1y" for " dg-do 2 run { target c++1y } "