common/hooks/do-patch/00-patches: drop -l option

The -l option causes a looser behavior of patch(1), where patches
are applied when there is a match with no regard to leading
whitespace. This means that it is possible to get false positives:
for example, in srcpkgs/glu, there is a patch that was supposed
to be long gone (since the release already includes it) but it
was overlooked since with -l it happens to apply in a different
portion of the source (where it is wrong).

Avoid these cases.

common/hooks/do-patch/00-patches.sh

@@ -31,7 +31,7 @@ _process_patch() {
 
 	cd "$wrksrc"
 	msg_normal "$pkgver: patching: ${_patch}.\n"
-	patch -sl ${_args} -i ${_patch} 2>/dev/null
+	patch -s ${_args} -i ${_patch} 2>/dev/null
 }
 
 hook() {