xed_mbuild.py: add python 2.7 and 3.4 versions checks
xed_mbuild.py: add python 2.7 and 3.4 versions checks

Change-Id: I15a57a6939bc50ab4a5192a0c4c06502c77895b8
(cherry picked from commit 45f6033d43874156ee800b5803d7ce218d96610a)

intelxed/xed,intelxed/xed,intelxed/xed,intelxed/xed