community/gnome-keyring: fix pam lib linking

The build scripts don't seem to link to libintl correctly, which causes
the `pam_gnome_keyring.so` library to fail.

community/gnome-keyring/APKBUILD

@@ -19,6 +19,7 @@ subpackages="$pkgname-lang $pkgname-doc"
 source="https://download.gnome.org/sources/gnome-keyring/${pkgver%.*}/gnome-keyring-$pkgver.tar.xz"
 
 build() {
+	export LDFLAGS="$LDFLAGS -lintl"
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \