This commit changes the both CFLAGS and CXXFLAGS when building the
valgrind ptest binaries by appending -O0, forcing no optimizations
instead of the default -O2. For qemux86-64, this change results in
FAIL/PASS ratio improvements from 149/394 to 58/485.
It is evident that the expected result files were generated from
regression tests binaries built without optimizations.
[ YOCTO #8063 ]
Signed-off-by: Dave Lerner <dave.lerner@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>