python:
 * fix r10065, i.e. use PYTHON instead of $(PKG) since the latter is not expanded
 * move /usr/lib/libpython2.7.a to the list of development files
 * refs #1839


git-svn-id: file:///var/svn/freetz/trunk@10066 149334a1-2f27-0410-a3b9-fc62619ac1e6