gdm: patch pam files for turnstile

srcpkgs/gdm/patches/pam-turnstile-elogind.patch

@@ -0,0 +1,13 @@
+pam_turnstile allows turnstile to integrate with gdm
+
+See also: https://github.com/chimera-linux/cports/blob/master/main/gdm/patches/pam.patch
+
+--- a/data/pam-arch/gdm-launch-environment.pam
++++ b/data/pam-arch/gdm-launch-environment.pam
+@@ -14,6 +14,7 @@
+ session    required                    pam_succeed_if.so    audit quiet_success user in gdm:gnome-initial-setup
+ session    optional                    pam_permit.so
+ -session   optional                    pam_systemd.so
++-session   optional                    pam_turnstile.so
+ -session   optional                    pam_elogind.so
+ session    required                    pam_env.so

srcpkgs/gdm/template

@@ -1,7 +1,7 @@
 # Template file for 'gdm'
 pkgname=gdm
 version=45.0.1
-revision=1
+revision=2
 build_helper="gir"
 build_style=meson
 configure_args="