Use them if package doesn't use defaults.
While here always create $wrksrc/libtool if libtool is installed,
sometimes it's not there and you might need it anyway.
This fixes jpeg package.
--HG--
extra : convert_revision : 6d846b82f44bc4b2e837c6cb6355b4d18bc7edfb
run_stuff_before="configure build install"
while here, document them in example.tmpl.
--HG--
extra : convert_revision : acca2ad2aed2467b244037b60132cf5461057acc
used in templates.
Remove all comments from the other templates, if you want to know what
are their meaning, look at the example template.
--HG--
extra : convert_revision : 348bbf4b780be0eba186ba2062cecf05cbbf8a69
