Revert "debian: move ceph-dencoder to ceph from ceph-common"

This reverts commit b37e3bde3bd31287b11c069062280258666df7c5.
Revert "ceph.spec: move ceph-dencoder to ceph from ceph-common"

This reverts commit 95f5a448b52db545a2b9bbad47fdb287254f93ea.
libosd_types, libos_types, libmon_types

Signed-off-by: Sage Weil <sage@redhat.com>
rgw: move a bunch of stuff into rgw_dencoder

This will help out ceph-dencoder ...

Signed-off-by: Sage Weil <sage@redhat.com>
ceph-dencoder: don't link librgw.la (and rados, etc.)

Signed-off-by: Sage Weil <sage@redhat.com>
configure: don't link blkid, udev to everything

These are already explicitly called out for libkrbd; don't need them in
LIBS.

Signed-off-by: Sage Weil <sage@redhat.com>