build: do not generate .d file of the uploaded manifest

Fixes #116.

Because modules add files to which cannot be handled by our build
system incremental build fails with messages like this:

  make[1]: *** No rule to make target `/home/tgrabiec/src/osv \
     /apps/cassandra//upstream/jna-3.`

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>

build.mk

@@ -648,7 +648,7 @@ bare.img: scripts/mkzfs.py $(jni) bare.raw $(out)/bootfs.manifest
 
 usr.img: bare.img $(out)/usr.manifest $(out)/cmdline
 	$(call quiet, cp bare.img $@)
-	$(src)/scripts/upload_manifest.py -o $@ -d $@.d -m $(out)/usr.manifest \
+	$(src)/scripts/upload_manifest.py -o $@ -m $(out)/usr.manifest \
 		-D jdkbase=$(jdkbase) -D gccbase=$(gccbase) -D \
 		glibcbase=$(glibcbase) -D miscbase=$(miscbase)
 	$(call quiet, $(src)/scripts/imgedit.py setargs $@ $(shell cat $(out)/cmdline), IMGEDIT $@)