fix installer using wrong platform and arch

package.json

@@ -89,7 +89,7 @@
         "c9.ide.help.support": "#e95f98f87c",
         "c9.ide.imgeditor": "#66a9733dc1",
         "c9.ide.immediate": "#627be383c0",
-        "c9.ide.installer": "#be8d9aa07c",
+        "c9.ide.installer": "#0fde9f0067",
         "c9.ide.mount": "#292b312b4b",
         "c9.ide.navigate": "#6e4efa5b25",
         "c9.ide.newresource": "#f1f0624768",