python-edje: Fix building by preventing attempted use of examples

python-edje: Fix building by preventing attempted use of examples

The examples apparently require compilation of .edc files to .edj
files using a program called edje_cc.  I have no idea how the upstream
Makefile is supposed to work but it contains no such instructions and
errors out without this configure option.

(From meta-openembedded rev: 23ad6cfe2be0dc076f5f286e0f72e345667cf352)

Signed-off-by: Bob Ham <rah@settrans.net>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>