Fix signing of debug packages

Commit 9c8d7a80

 broke the signing of debug packages by merging code up but
not changing the test condition.
Signed-off-by: Allan McRae <allan@archlinux.org>

scripts/libmakepkg/integrity/generate_signature.sh.in

@@ -63,7 +63,7 @@ create_package_signatures() {
 	done
 
 	# check if debug package needs a signature
-	if ! check_option "debug" "y" || ! check_option "strip" "y"; then
+	if check_option "debug" "y" && check_option "strip" "y"; then
 		pkg=$pkgbase-@DEBUGSUFFIX@
 		pkgarch=$(get_pkg_arch)
 		pkg_file="$PKGDEST/${pkg}-${fullver}-${pkgarch}${PKGEXT}"