build-ceph-deb-native: no libbabeltrace for wheezy

Signed-off-by: Sage Weil <sage@redhat.com>
build_debs: horrible hack to remove libbabeltrace from wheezy build deps

There is no package available, so remove it from build deps.

This is just to get around the control file checks.  The build already
does not enable support on wheezy.

Signed-off-by: Sage Weil <sage@redhat.com>
Merge pull request #13 from ceph/wip-babeltrace

some ugly hacks to make wip-lttng build on wheezy