Revision 1659397

[Reverted in r1659546]
Do not attempt to build bindings with Swig 3.0+. Current versions
break the Python bindings.

* build/ac-macros/swig.m4
  (SVN_FIND_SWIG): Add an upper limite to supported Swig versions.
   Do not configure bindings if the detected Swig is not suitable.

* TODO: Remove.