Regressions on trunk at revision 186371 vs revision 186305

[H.J. Lu Intel64 Core 2/i7]

New failures:

New passes:
ERROR: tcl error sourcing ../../../../src-trunk/boehm-gc/testsuite/../../gcc/testsuite/lib/prune.exp.
ERROR: tcl error sourcing ../../../../src-trunk/libgomp/testsuite/../../gcc/testsuite/lib/prune.exp.
ERROR: tcl error sourcing ../../../../src-trunk/libitm/testsuite/../../gcc/testsuite/lib/prune.exp.