pythonnative: set PYTHON_EXECUTABLE so that cmake can find it
| CMake Error at /home/a.mueller/tmp/oe-core-glibc/sysroots/x86_64-linux/usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:108 (message):
| Could NOT find PythonInterp (missing: PYTHON_EXECUTABLE)
[RP: Added comment that is used by cmake] Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
