Regressions on trunk at revision 235003 vs revision 234932

[H.J. Lu ia32 Core i7]

New failures:
FAIL: g++.dg/cpp1y/vla11.C  -std=c++11 execution test
FAIL: g++.dg/cpp1y/vla11.C  -std=c++14 execution test

New passes:
FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/reduction-2.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1  -O2  execution test
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-2.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1  -O2  execution test