Created attachment 232577 [details] [review]
proposed patch

1) NetworkManager needs libnl-3.0.pc, libnl-genl-3.0.pc and libnl-route-3.0.pc in order to properly finish the configure phase. 
2) `jhbuild sydeps` searchs only for libnl-3.0.pc
3) on debian systems the three .pc files are split across 3 packages (libnl-3-dev, libnl-genl-3-dev and libnl-route-3-dev)

Here is a quick patch that adds libnl-genl and libnl-route deps to NetworkManager, plus relevant systemmodule nodes. It's untested on non-debian system.

Not sure this is the best way to handle a situation like this one, maybe we should update jhbuild in order to manage a syntax like:

  <systemmodule id="somelib">
    <pkg-configs>
      <pkg-config>somelib-part1.pc</pkg-config>
      <pkg-config>somelib-part2.pc</pkg-config>
      <pkg-config>somelib-part3.pc</pkg-config>
    </pkg-configs>
  [...]