swig-pl: Fix `unable to close filehandle` warnings on termination of each test.

* subversion/bindings/swig/perl/native/t/5delta-compat.t
* subversion/bindings/swig/perl/native/t/5delta.t
* subversion/bindings/swig/perl/native/t/6ra.t
  (): Add `close ...`


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1915576 13f79535-47bb-0310-9956-ffa450edef68
3 files changed