Allow passing in the caller to the make rule, so that other modules

(that aren't user projects) can use it to add targets to their callers


[SVN r18137]

tools/build

@@ -1 +1 @@
-Subproject commit 902719f2b0fc5051de12b0b2f148dc055f0ee283
+Subproject commit 3797ec40825e9f9cd6e7850fed7153dd580a15a5