combo-layer: fix revlist taking into account file_filter

If file_filter is set, git format-patch takes account but git rev-list
does not. So revlist is going to get with wrong revisions. And last_revision
will be updated with wrong revision. The next time that user run
combo-layer it complain about applying patches.

So ensure that 'git rev-list' are using file_filter as 'git format-patch'.

(From OE-Core rev: c22e40900d8e33c2c884e714c11ddb771b86923f)

(From OE-Core rev: 7ad5b4dece1d8fba6f1b6b530830384e6c8fb74f)

Signed-off-by: João Henrique Ferreira de Freitas <joaohf@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/combo-layer

@@ -395,7 +395,7 @@ def action_update(conf, args):
         logger.debug("generated patch set:\n%s" % output)
         patchlist = output.splitlines()
 
-        rev_cmd = 'git rev-list --no-merges ' + rev_cmd_range
+        rev_cmd = "git rev-list --no-merges %s -- %s" % (rev_cmd_range, file_filter)
         revlist = runcmd(rev_cmd, ldir).splitlines()
 
         # Step 3: Call repo specific hook to adjust patch