Break Pathscale 3.2 build while trying to bring up 4.x.

Remove pathscale.jam AR rule to see if we can link with
4.x.  Will figure out later how to support both, if 
necessary.



[SVN r68762]

tools/build

@@ -1 +1 @@
-Subproject commit 62d1e7cc112c02dda6b63fef3d2a884eefef072c
+Subproject commit d0587e06c6fd3f7aba657c66cc12e690432d44fd