Print only major.minor.micro version of python.

This will avoid printing the compiler version python was built with.
Showing the compiler version led to confusion multiple times.

Change-Id: I4ced2128b92c83a41f616bcf756f2c313a9caed3
Reviewed-by: Andras Becsi <andras.becsi@theqtcompany.com>

tools/buildscripts/gyp_qtwebengine

@@ -5,7 +5,7 @@ import os
 import sys
 import subprocess
 
-print 'using python: ' + sys.executable + ' version: ' + sys.version
+print 'using python: ' + sys.executable + ' version: ' + str(sys.version_info.major) + '.' + str(sys.version_info.minor) + '.' + str(sys.version_info.micro)
 
 if sys.platform == "darwin":
   print 'xcode version: ' + subprocess.check_output(['xcodebuild', '-version']).replace('\n', ' ')