This makes sure that we don't keep old vendor_boot artifacts around after a clean. Signed-off-by: Will McVicker <willmcvicker@google.com> Fixes: 151957122 Bug: 151949371 Test: touch $OUT/vendor-ramdisk/test-file && make installclean Change-Id: I357929583f234212a998dceaa31506fce42e0255