/usr/lib/x86_64-linux-gnu/libcmtspeechdata.so is in libcmtspeechdata-dev 2.1.1+git20150211~9206835-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libcmtspeechdata.so.0.1.0