emerge/actions: Add python version to portage version line

Adds the currently running python version to the portage version line,
so that it's immediately obvious what version of python is being used to
run portage.
diff --git a/pym/_emerge/actions.py b/pym/_emerge/actions.py
index 2a1354b..ff72d70 100644
--- a/pym/_emerge/actions.py
+++ b/pym/_emerge/actions.py
@@ -2996,6 +2996,7 @@
 	return profilever
 
 def getportageversion(portdir, _unused, profile, chost, vardb):
+	pythonver = 'python %d.%d.%d-%s-%d' % sys.version_info[:]
 	profilever = None
 	repositories = vardb.settings.repositories
 	if profile:
@@ -3051,8 +3052,8 @@
 	gccver = getgccversion(chost)
 	unameout=platform.release()+" "+platform.machine()
 
-	return "Portage %s (%s, %s, %s, %s)" % \
-		(portage.VERSION, profilever, gccver, ",".join(libcver), unameout)
+	return "Portage %s (%s, %s, %s, %s, %s)" % \
+		(portage.VERSION, pythonver, profilever, gccver, ",".join(libcver), unameout)
 
 def git_sync_timestamps(portdb, portdir):
 	"""