Add 'gdp' to faster google stuff around debian packaging

dotfiles/config/bmo/wish.ini

     deb     = https://packages.debian.org/search?keywords=%s
     fd      = http://foldoc.org/%s
     g       = http://www.google.com/search?q=%s
+    gdp     = https://www.google.com/search?q=debian+packaging+%s
     ht      = http://%s/
     kb      = https://keybase.io/%s/
     kbfs    = https://keybase.pub/%s/