Since `bin/solfege`, which is a Pythons script, gets moved to `libexec`, it then expects the `share` dir to also exist in `libexec`.  Changing this line to solfege's Cellar location fixes the Python errors that come up.

Other option would be to move `share` to `libexec` as well, but it didn't look like any symbolic links get created after the installation to `libexec/share`.