librados: statically link gtest into librados unit tests
librados: statically link gtest into librados unit tests

This way they can run via teuthology.

We should do this for anything that we expect to run outside of the
immediate build environment.

Signed-off-by: Sage Weil <c5b6ff1fd4f0bde10db63d7a3e07166cf6c4229f@dreamhost.com>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph