K 10
svn:author
V 8
bdrewery
K 8
svn:date
V 27
2018-07-03T21:29:04.959716Z
K 7
svn:log
V 845
Fix .depend.foo.o tracking for sys/conf/files defined compilations.

Some example files:
  ia32_genassym.o
  acpi_wakecode.o

The old mkdep method also lacked tracking these files.

Objects defined in sys/conf/files with no-obj and no-implicit-rule get their
own targets defined in the kernel Makefile but lack having their objects added
to DEPENDOBJS so never get a .depend file generated.  Normally if an object is
in OBJS it will get a .depend file.

Fix this by looking for .o files in CLEAN and ensuring they are part of
the -MD filtering and .depend loading.  This is a hack.  Other solutions
could exist involving sys/conf/files or config(8) to auto add these to
DEPENDFILES/DEPENDOBJS but this method seems reliable enough without being
intrusive or error-prone for new files.

Reported by:	bde
MFC after:	3 weeks
Sponsored by:	Dell EMC

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