The library libxml2 can provide its own bindings for python2 in addition
to the third party python-lxml and python3-lxml packages if this
functionality is enabled in PACKAGECONFIG.
But in case the functionality is disabled there's no need to depend
on python2.
Make the dependency on python2 enabled only if the python feature
is added to PACKAGECONFIG. Also add missing run-time dependency on make
to libxml2-ptest.
Signed-off-by: Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
