config: add service_locator_config.json

Change-Id: I53fae62929b6c088f92992b7fd329cfc277b2574

Author: maxwen

config/service_locator_config.json

@@ -0,0 +1,5 @@
+{
+    "download_base_url": "https://dl.omnirom.org/",
+    "store_base_url": "https://95.216.102.24/",
+    "images_base_url": "https://dl.omnirom.org/"
+}