fix(oem-gce): use cloud-config instead of run

sdk_container/src/third_party/coreos-overlay/coreos-base/oem-gce/files/cloud-config.yml

@@ -0,0 +1,14 @@
+#cloud-config
+
+coreos:
+    units:
+      - name: ec2-ssh-key.service
+        runtime: yes
+        content: |
+          [Unit]
+          Description=Sets SSH key from metadata
+
+          [Service]
+          Type=oneshot
+          StandardOutput=journal+console
+          ExecStart=/usr/share/oem/bin/gce-ssh-key

sdk_container/src/third_party/coreos-overlay/coreos-base/oem-gce/oem-gce-0.0.1.ebuild

@@ -15,10 +15,12 @@ IUSE=""
 # no source directory
 S="${WORKDIR}"
 
+RDEPEND="dev-lang/python"
+
 src_install() {
-	exeinto "/"
-	doexe ${FILESDIR}/run
+	into "/"
+	dobin ${FILESDIR}/gce-ssh-key
 
 	insinto "/"
-	doins ${FILESDIR}/oem-release
+	doins ${FILESDIR}/cloud-config.yml
 }