trogdor: support mbn_version 6 with python build scripts

Developer/Reviewer, be aware of this patch from Mistral:
 https://review.coreboot.org/c/coreboot/+/33425/18

Change-Id: I020d1e4d4f5c948948e1b39dd18af1d0e860c279
Signed-off-by: T Michael Turney <mturney@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35506
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

util/qualcomm/qgpt.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python2
 #============================================================================
 #
 #/** @file qgpt.py