tests/scm_rights-fd.test: fix pathname regex
tests/scm_rights-fd.test: fix pathname regex

Pathname containing >, }, or non-printable characters was resulting
in failing of the test.

* tests/scm_rights-fd.test: Fix pathname regex and simplify things.

cuviper/strace,Saruta/strace,cuviper/strace,Saruta/strace,cuviper/strace,cuviper/strace,Saruta/strace,Saruta/strace,cuviper/strace,Saruta/strace