Change buildspec artifacts to %_topdir/RPMS/*

In theory, this will allow us to publish the repo in a bucket
without needing an extra step.

Author: mjmac

buildspec.yml

@@ -22,5 +22,5 @@ phases:
       - echo Build completed on `date`
 artifacts:
   files:
-    - /tmp/repo.zip
+    - /tmp/rpmbuild/RPMS/*
   discard-paths: yes