/usr/lib/x86_64-linux-gnu/libespeak.a is in libespeak-ng-libespeak-dev 1.49.0+dfsg-11.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libespeak-ng.a
/usr/lib/x86_64-linux-gnu/libespeak-ng.a