Restore runtime dependencies.

Update to depend upon host:f27 and platform:27, which are now available.

hardware-support.yaml

@@ -22,11 +22,10 @@ data:
             #
             # This is a temporary workaround until then.
             bootstrap: master
-        # TODO: Enable the following runtime requires when they are ready
-        #requires:
-        #    platform: f27
-        #    host: f27
-        #    perl: f27
+        requires:
+            platform: f27
+            host: f27
+            perl: master
     references:
         community: https://fedoraproject.org/wiki/Host_and_Platform
         documentation: https://github.com/fedora-modularity/hp