Regressions on trunk at revision 206255 vs revision 206243

[H.J. Lu Intel64]

New failures:

New passes:
FAIL: 17_intro/headers/c++200x/stdc++.cc (test for excess errors)
FAIL: 17_intro/headers/c++200x/stdc++_multiple_inclusion.cc (test for excess errors)
FAIL: g++.dg/tsan/default_options.C  -O2  execution test