Add gp-suspend.service

packaging/pkgbuild/gp.install

@@ -0,0 +1,12 @@
+post_install() {
+    systemctl --system daemon-reload
+    systemctl enable gpservice.service
+}
+
+post_upgrade() {
+    post_install
+}
+
+post_remove() {
+    systemctl disable gpservice.service
+}