Revert configure support for adding -Werror=format-security.

This reverts part of valgrind svn r13962. There was a typo in the configure
check that caused failures when -Werror=format-security wasn't supported
and the flag interfered badly with -Wno-format-zero-length. So remove
for now and only add back when properly tested on various (older) setups.

git-svn-id: svn:// a5019735-40e9-0310-863c-91ae7b9d1cf9
2 files changed