bash: Add more long options to be completed with "git --<TAB>"

Add the following long options to be completed with command "git":

	--paginate
	--work-tree=
	--help

Signed-off-by: Teemu Likonen <tlikonen@iki.fi>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

contrib/completion/git-completion.bash

@@ -1271,11 +1271,14 @@ _git ()
 		case "${COMP_WORDS[COMP_CWORD]}" in
 		--*=*) COMPREPLY=() ;;
 		--*)   __gitcomp "
+			--paginate
 			--no-pager
 			--git-dir=
 			--bare
 			--version
 			--exec-path
+			--work-tree=
+			--help
 			"
 			;;
 		*)     __gitcomp "$(__git_commands) $(__git_aliases)" ;;