liburing: use -fPIC for both static and shared libraries

At least for ceph, it fails to statically link with liburing because
we don't use -fPIC for the static version of the library.

This reverts commit a17aec8458544f5ad3ce234b4750dce35a621081.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed