K 10
svn:author
V 3
sjg
K 8
svn:date
V 27
2019-09-13T05:54:09.005259Z
K 7
svn:log
V 299
Use file destdir for stage_as sets

We cannot use file (without :T) to name targets
but we can use the destination directory (with / replaced by _)
This has the benefit of minimizing the targets created.

MFC r351954

Reviewed by:	bdrewery
Differential Revision:	https://reviews.freebsd.org//D21283

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