Tell ignore file about generate files in /gitweb/static

Signed-off-by: NMark Rada <marada@uwaterloo.ca>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

.gitignore

@@ -158,7 +158,7 @@
 /gitk-git/gitk-wish
 /gitweb/GITWEB-BUILD-OPTIONS
 /gitweb/gitweb.cgi
-/gitweb/gitweb.min.*
+/gitweb/static/gitweb.min.*
 /test-chmtime
 /test-ctype
 /test-date