Regressions on trunk at revision 229511 vs revision 229494

[Bill Schmidt]

New failures:
FAIL: g++.dg/conversion/ambig1.C  -std=c++98 (test for excess errors)
FAIL: g++.dg/conversion/ambig1.C  -std=c++98  (test for warnings, line 5)

New passes:
FAIL: g++.dg/cpp0x/rv2n.C  -std=gnu++11 (test for excess errors)
FAIL: gfortran.dg/allocate_with_source_15.f03   -O0  execution test
FAIL: gfortran.dg/allocate_with_source_15.f03   -O1  execution test
FAIL: gfortran.dg/allocate_with_source_15.f03   -O2  execution test
FAIL: gfortran.dg/allocate_with_source_15.f03   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/allocate_with_source_15.f03   -O3 -g  execution test
FAIL: gfortran.dg/allocate_with_source_15.f03   -Os  execution test
FAIL: runtime