Update git-archive documentation

Documentation/git-archive.txt: Document -v/--verbose option.
Add -l as short form of --list.
Signed-off-by: NAndrew Ruder <andy@aeruder.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Documentation/git-archive.txt

@@ -32,9 +32,12 @@ OPTIONS
 --format=<fmt>::
 	Format of the resulting archive: 'tar', 'zip'...
 
---list::
+--list, -l::
 	Show all available formats.
 
+--verbose, -v::
+	Report progress to stderr.
+
 --prefix=<prefix>/::
 	Prepend <prefix>/ to each filename in the archive.