Regressions on master at commit r12-5887 vs commit r12-5853 on Linux/i686

[H.J. Lu]

New failures:
FAIL: compiler driver --help=param option(s): "^ +-.*[^:.]$" absent from output: "  --param=max-inline-functions-called-once-loop-depth= Maximum loop depth of a call which is considered for inlining functions called once"
FAIL: compiler driver --help=params option(s): "[^.]$" absent from output: "e"
FAIL: g++.dg/warn/string1.C    (test for warnings, line 17)

New passes:
FAIL: libgomp.c++/target-lambda-1.C execution test
FAIL: libgomp.c++/target-this-3.C execution test
FAIL: libgomp.c++/target-this-4.C execution test