Regressions on trunk at revision 205616 vs revision 205607

[H.J. Lu ia32]

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: 30_threads/async/async.cc execution test