Fix extra updates on targets when a header has the same name as a directory which is in the headers search path.

[SVN r26228]

tools/build

@@ -1 +1 @@
-Subproject commit d18e739630e0355981662080c3d13eb864b28e41
+Subproject commit af9048847caf4028aa08121ad05d60dff22de106