Implement new 'standalone-manifest' feature that prevents Boost.Build

from embedding the manifest in the produced libraries.


[SVN r49645]

tools/build

@@ -1 +1 @@
-Subproject commit 260997933fbd5218aa5758af2cbf44c5efe7f278
+Subproject commit 66155c1686f12ffc2a528bb871a4a11683e87e66