flashrom: keep Code-Review votes on trivial rebase and no-code changes

Also avoid sending mails to flashrom-gerrit@ for draft CLs.

Change-Id: I9a76f9646269e38556f3c4f766cbf52a720a1d1d
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/20182

project.config

@@ -12,6 +12,20 @@
 [access "refs/tags/*"]
 	push = +force group flashrom developers
 
+[label "Code-Review"]
+	function = MaxWithBlock
+	abbreviation = R
+	copyMinScore = true
+	value = -2 Do not submit
+	value = -1 I would prefer that you didn't submit this
+	value =  0 No score
+	value = +1 Looks good to me, but someone else must approve
+	value = +2 Looks good to me, approved
+	copyAllScoresOnTrivialRebase = true
+	copyAllScoresIfNoCodeChange = true
+	defaultValue = 0
+
 [notify "flashrom-gerrit"]
 	email = flashrom-gerrit@flashrom.org
 	header = to
+	filter = -is:draft