Windows: netidmgr_plugin must include afsconfig.h

Windows: netidmgr_plugin must include afsconfig.h

In order to properly use afs headers afsconfig.h must
be included first in afsfuncs.c.  Update the makefile
to specify the correct include paths.

Since this results in the afs assert.h being used,
we must include the lib file that includes the
AssertionFailed function.

LICENSE MIT

Change-Id: I46f76410ea16eeffeb8406ef4e89120a3255366a
Reviewed-on: http://gerrit.openafs.org/1954
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>