title: Yocto do_package() syntax to add recipe with scons.py
body: <p>I am trying to include the libjsoncpp package into my Yocto build, which is not currently included in Yocto's package list.  I downloaded the source files from <a href="http://sourceforge.net/projects/jsoncpp/files/jsoncpp/" rel="nofollow">http://sourceforge.net/projects/jsoncpp/files/jsoncpp/</a>.  The package does not come with an INSTALL script but instead uses scons.py.  How can I write the install script for this as a recipe?  </p>
  
  <p>Thanks </p>