* bluetooth.h is autodetected from sysroot and influences 2 python files:
/usr/include/python2.7/pyconfig-32.h
/usr/lib/python2.7/lib-dynload/_socket.so
* it doesn't link with bluez, so it wasn't detected by
test-dependencies.sh, but still causes undeterministic builds and
should be fixed
* we can use PACKAGECONFIG, but I don't expect many people to use bt
support in python-socket
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>