Update SWIG m4 macros
Update SWIG m4 macros

The previous version improperly compared versions which gave fun output
like: SWIG version >= 1.3.24 is required.  You have 2.0.0.

neuschaefer/libgpod,hyperair/libgpod,neuschaefer/libgpod,hyperair/libgpod,neuschaefer/libgpod,neuschaefer/libgpod,hyperair/libgpod,hyperair/libgpod,hyperair/libgpod,neuschaefer/libgpod