ceph.spec.in:BuildRequires sharutils

ceph.spec.in:BuildRequires sharutils

The uudecode binary is used to build Java-related components, and
uudecode is provided by the sharutils package on all supported
RPM platforms. When building with "--without=cephfs_java",
sharutils is not needed.

Thanks to Nathan Cutler <ncutler@suse.cz> for going into the
details with me.

On OBS without this patch we get the error message:

[  170s] -----------------------------------------------------------------
[  170s] ----- building ceph.spec (user abuild)
[  170s] -----------------------------------------------------------------
[  170s] -----------------------------------------------------------------
[  170s] + exec rpmbuild -ba --define '_srcdefattr (-,root,root)' --nosignature --define 'disturl obs://build.opensuse.org/home:osynge:ceph:wip:wip_obs_fedora/Fedora_20/c0bbbc1e62228ca956ac3d367edc4fba-master' /home/abuild/rpmbuild/SOURCES/ceph.spec
[  170s] error: Failed build dependencies:
[  170s]    sharutils is needed by ceph-1:2+git.1435043747.c1bd02c-1.1.x86_64

With this patch we can build fedora 22 and fedora 20 rpms fine.

Signed-off-by: Owen Synge <osynge@suse.com>