bash: teach 'git reset --patch'

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Acked-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/completion/git-completion.bash

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 7ebc61b..6fd7e1d 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -1780,7 +1780,7 @@
 	local cur="${COMP_WORDS[COMP_CWORD]}"
 	case "$cur" in
 	--*)
-		__gitcomp "--merge --mixed --hard --soft"
+		__gitcomp "--merge --mixed --hard --soft --patch"
 		return
 		;;
 	esac