erasure-code: bump jerasure shared library version

The jerasure plugin behavior and interface did not change, there is no
need to rename the plugin. However, the binaries have changed and the
shared library version should reflect the change.

http://tracker.ceph.com/issues/9153 Fixes: #9153

Signed-off-by: Loic Dachary <loic-201408@dachary.org>