K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2017-10-17T19:11:29.399389Z
K 7
svn:log
V 407
loader.mk: clean md.o even if MD_IMAGE_SIZE not defined

We don't normally provide special handling for optionally-included src
files, but md.o depends on both md.c and the value of ${MD_IMAGE_SIZE}.
Previously if one built with MD_IMAGE_SIZE, executed "make clean", and
then built with a different MD_IMAGE_SIZE md.o would not be rebuilt.

Reported by:	Zakary Nafziger
Sponsored by:	The FreeBSD Foundation

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