* tools/fop.jam: Cleanup. Accept command, not path, just like other toolsets.

Check for duplicate initialization.


[SVN r26100]

tools/build

@@ -1 +1 @@
-Subproject commit 22c6f4e4c01888839f2aa9fff4c9e6c3a97cafe5
+Subproject commit 4bfc1df6d578713ea0ec63730f58b4b06cf01ee3