completion: add --cc and --no-attachment option to format-patch

Signed-off-by: Stephen Boyd <bebarino@gmail.com>
Trivially-Acked-By: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/completion/git-completion.bash

@@ -932,13 +932,13 @@ _git_format_patch ()
 	case "$cur" in
 	--*)
 		__gitcomp "
-			--stdout --attach --thread
+			--stdout --attach --no-attach --thread
 			--output-directory
 			--numbered --start-number
 			--numbered-files
 			--keep-subject
 			--signoff
-			--in-reply-to=
+			--in-reply-to= --cc=
 			--full-index --binary
 			--not --all
 			--cover-letter