K 10
svn:author
V 4
will
K 8
svn:date
V 27
2014-09-18T14:41:57.453066Z
K 7
svn:log
V 361
Fix incremental builds involving non-root users with read-only source files.

Makefiles should not assume that source files can be overwritten.  This is the
common case for Perforce source trees.

This is a followup commit to r211243 in the same vein.

MFC after:	1 month
Sponsored by:	Spectra Logic
MFSpectraBSD:	r1036319 on 2014/01/29, r1046711 on 2014/03/06

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