Remove the -rename option in the Go language support. Do a much

better job of checking for name conflicts.  Ignore conflicting names
with a warning.  Adjust the testsuite accordingly.


git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12135 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/constant_pointers.i

@@ -5,6 +5,7 @@ This testcase primarily test constant pointers, eg int* const.  Only a getter is
 %module constant_pointers
 
 %warnfilter(SWIGWARN_TYPEMAP_SWIGTYPELEAK);                   /* memory leak when setting a ptr/ref variable */
+%warnfilter(SWIGWARN_GO_NAME_CONFLICT);                       /* Ignoring 'Foo' due to Go name ('Foo') conflict with 'foo' */
 
 %inline %{