K 10
svn:author
V 8
bdrewery
K 8
svn:date
V 27
2018-04-12T20:27:57.829327Z
K 7
svn:log
V 366
Fix using wrong SYSDIR after r331683.

This was inadvertently overriding the first found SYSDIR with the last
of /usr/src which could result in the wrong headers being used if not
building from /usr/src.

SYSDIR?= is not used here to avoid evaluating the exists() when unneeded.

Reported by:	rgrimes, sjg, Mark Millard
Pointyhat to:	bdrewery
Sponsored by:	Dell EMC

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