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svn:author
V 6
brooks
K 8
svn:date
V 27
2013-04-30T20:15:53.350856Z
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svn:log
V 343
MFC r249906:

Use the system MAKEOBJDIRPREFIX when running make targets in
mergemaster.  This allows bootstrap verions of tools to be used.

Add a note to UPDATING about this change.

This commit is a partial backout of r248531 in that it removes an
accidentally committed change to mergemaster.

Discussed with:	jhb
Sponsored by:	DARPA, AFRL

END