common/latex.py: use distro module for python3.5 and up

common/latex.py

@@ -3,8 +3,11 @@
 #
 
 import os
-import platform
 import re
+try:
+    from distro import linux_distribution
+except:
+    from platform import linux_distribution
 
 package_test_preamble = ['\\newif\\ifsphinxKeepOldNames \\sphinxKeepOldNamestrue',
                          '\documentclass[a4paper,11pt,english]{report}']
@@ -82,7 +85,7 @@ def tex_test(test):
 def host_name():
     uname = os.uname()
     if uname[0] == 'Linux':
-        distro = platform.dist()
+        distro = linux_distribution()
         name = '%s/%s' % (uname[0], distro[0])
         version = distro[1]
     else: