Apply patch from Reece Dun to remove the generation of response files as targets. But instead use the @() bjam functionality.

[SVN r31562]

tools/build

@@ -1 +1 @@
-Subproject commit f43778a768f5891304dcc300c0643826309278c2
+Subproject commit 15c10c2e165eca9c3b9114c189c5eb076cecc87e