Regressions on trunk at revision 218683 vs revision 218663

[H.J. Lu x32 -fpic]

New failures:
FAIL: g++.dg/cpp1y/pr63996.C  -std=c++14 (test for excess errors)
FAIL: libitm.c/stackundo.c (test for excess errors)

New passes:
FAIL: g++.dg/ubsan/cxx1y-vla.C   -O0  execution test
FAIL: g++.dg/ubsan/cxx1y-vla.C   -O1  execution test
FAIL: g++.dg/ubsan/cxx1y-vla.C   -O2  execution test
FAIL: g++.dg/ubsan/cxx1y-vla.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: g++.dg/ubsan/cxx1y-vla.C   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: g++.dg/ubsan/cxx1y-vla.C   -O3 -fomit-frame-pointer  execution test
FAIL: g++.dg/ubsan/cxx1y-vla.C   -O3 -g  execution test
FAIL: g++.dg/ubsan/cxx1y-vla.C   -Os  execution test
ERROR: Couldn't find library file target-utils.exp.
ERROR: Couldn't find library file target-utils.exp.