Older gcc compilers do not support -Wendif-labels, so move it from the
hardcoded list to the dynamically detected list.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>