binutils-mingw-w64 test failure on ppc64el

[Matthias Klose]

ppc64el only, tests succeed on all other architectures.
see https://launchpad.net/ubuntu/+source/binutils-mingw-w64/7.4build1/+build/12079821

make[4]: Entering directory '/<<PKGBUILDDIR>>/build/i686-w64-mingw32/libiberty'
make[5]: Entering directory '/<<PKGBUILDDIR>>/build/i686-w64-mingw32/libiberty/testsuite'
gcc -DHAVE_CONFIG_H -g -O3 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fPIE -fstack-protector-strong -Wformat -Werror=format-security -Wl,-Bsymbolic-functions -fPIE -pie -Wl,-z,relro -Wl,-z,now -I.. -I../../../../upstream/libiberty/testsuite/../../include -o test-demangle \
 ../../../../upstream/libiberty/testsuite/test-demangle.c ../libiberty.a
./test-demangle < ../../../../upstream/libiberty/testsuite/demangle-expected
/bin/bash: line 1: 2299 Segmentation fault (core dumped) ./test-demangle < ../../../../upstream/libiberty/testsuite/demangle-expected
Makefile:53: recipe for target 'check-cplus-dem' failed
make[5]: *** [check-cplus-dem] Error 139
make[5]: Leaving directory '/<<PKGBUILDDIR>>/build/i686-w64-mingw32/libiberty/testsuite'
Makefile:500: recipe for target 'check-subdir' failed
make[4]: *** [check-subdir] Error 2
make[4]: Leaving directory '/<<PKGBUILDDIR>>/build/i686-w64-mingw32/libiberty'
Makefile:8100: recipe for target 'check-libiberty' failed
make[3]: *** [check-libiberty] Error 2
make[3]: Leaving directory '/<<PKGBUILDDIR>>/build/i686-w64-mingw32'
Makefile:2202: recipe for target 'do-check' failed
make[2]: *** [do-check] Error 2

[Matthias Klose (doko)]

can be worked around building with -O2 instead of -O3