Minor rename.

* build/virtual-targets.jam
  (action.properties): Renamed from 'properties-ps'.


[SVN r20517]

tools/build

@@ -1 +1 @@
-Subproject commit 75df6c10471a7dc60505e98393a04982524e4551
+Subproject commit bce9f20c7b22121af522be79f2a43a18f4c554bf