Add Documentation/cmd-list.made to .gitignore

Noticed by Randal L. Schwartz.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Documentation/.gitignore

@@ -2,6 +2,7 @@
 *.html
 *.1
 *.7
+*.made
 howto-index.txt
 doc.dep
 cmds-*.txt