Create io.github.stsdc.gadget_clock.json (#581)

Author: stsdc

applications/io.github.stsdc.gadget_clock.json

@@ -0,0 +1,5 @@
+{
+  "source": "https://github.com/stsdc/gadget_clock.git",
+  "commit": "90d4b3ecd2b8bba9eebb40777eaf2ba908d7b197",
+  "version": "0.5.1"
+}