add xcompmgr to the olpc-development stream builds

[Bernie Innocenti]

Erik Garrison wrote:
> Attached is a patch to pilgrim which adds xcompmgr to the
> olpc-development stream builds.  This is a prerequisite for testing.
> Size delta is negligible: I believe the binary is 26K.
> 
> Could we enable this?  Bernie and I are in agreement that we need to
> start testing of composite.

Where is the part to launch xcompgr from olpc-session?  I could commit it
for you.

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   // Bernie Innocenti - http://www.codewiz.org/
 \X/  Sugar Labs       - http://www.sugarlabs.org/