[server][tls] Add "lib/" sub directory to base directory

Before:

    ${localstatedir}/hatohol
    e.g.:
      /var/hatohol

After:

    ${localstatedir}/lib/hatohol
    e.g.:
      /var/lib/hatohol

Because /var/lib/${PACKAGE} is used as local data directory widely.
Merge pull request #528 from project-hatohol/server-tls-add-lib-to-base-directory

[server][tls] Add "lib/" sub directory to base directory