Revision 1905108

Merge r1900890 from trunk:

 * r1900890
   Follow up to r1900882: Restore Python 2.7 support on autogen.sh
   Justification:
     autogen.sh is need to build SWIG Python 2 bindings.
     We have not actively dropped Python 2.7 support, at least on 1.14.x.
   Depends:
     r1900882
   Votes:
     +1: futatuki, jun66j5, jamessan