reloc: provide libthread_db.so.1 to debug thread on gdb
reloc: provide libthread_db.so.1 to debug thread on gdb

In scylla-debuginfo package, we have /usr/lib/debug/opt/scylladb/libreloc/libthread_db-1.0.so-666.development-0.20190711.73a1978fb.el7.x86_64.debug
but we actually does not have libthread_db.so.1 in /opt/scylladb/libreloc
since it's not available on ldd result with scylla binary.

To debug thread, we need to add the library in a relocatable package manually.

Fixes #4673

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>
Message-Id: <20190711111058.7454-1-4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

scylladb/scylla,scylladb/scylla,avikivity/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla