Updating swig-2.0.11-1.tar.gz download file and hash.

The prior file had the root of the tar ball include "swig-2.0.11-1"
which was not expected in the superbuild.

Change-Id: I6fe7bbec01b6190ec52732db7c36f80fd34608c7
Merge topic 'SIMPLEITK-479_RemoveSWIGPatchStepUpdateDownload' into next

e52fbb0b Updating swig-2.0.11-1.tar.gz download file and hash.