Fixed multiple copies of text in header, because of multiple inclusion as dependent.

Added support for mutiple comment lines, so that the full boost copyright info can be generated.


[SVN r13216]

tools/build

@@ -1 +1 @@
-Subproject commit b92527ae554e946c1cf99742810b7e36a742a2d5
+Subproject commit 933c6260d3757f65434d6131f6fabfcebf115cb7