Regressions on trunk at revision 157723 vs revision 157705

[H.J. Lu ia64]

New failures:
FAIL: objc.dg/encode-1.m (test for excess errors)
FAIL: objc.dg/method-4.m (test for excess errors)
FAIL: objc.dg/sync-1.m (test for excess errors)
FAIL: objc.dg/try-catch-10.m (test for excess errors)
FAIL: objc.dg/try-catch-10.m  (test for warnings, line 32)
FAIL: objc.dg/zero-link-1.m (test for excess errors)
FAIL: objc.dg/zero-link-2.m (test for excess errors)
ERROR: objc.dg/method-4.m: error executing dg-final: couldn't open "method-4.s": no such file or directory
ERROR: objc.dg/zero-link-1.m: error executing dg-final: couldn't open "zero-link-1.s": no such file or directory
ERROR: objc.dg/zero-link-2.m: error executing dg-final: couldn't open "zero-link-2.s": no such file or directory

New passes: