meta-systemd: move libpam bbappend to oe-core prefix

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-systemd/oe-core/recipes-extended/pam/libpam_1.1.5.bbappend

@@ -0,0 +1,6 @@
+PRINC := "${@int(PRINC) + 1}"
+
+# Register with logind to make screen/tmux/etc work
+do_install_append() {
+	echo "session required	pam_systemd.so" >> ${D}${sysconfdir}/pam.d/common-session
+}