Fixed a failing test by making it access action output using the __ACTION_RULE__ rule so it would not be affected by the level of debug output given by Boost Build/Jam.

[SVN r42630]

tools/build

@@ -1 +1 @@
-Subproject commit a3e99b74c0bb24d66553116e72b8a93837ecada8
+Subproject commit 5f97bb484de432ecb24218cc00fdd9bb31016f6a