clustal-omega: style cleanup

Closes #1495.

Signed-off-by: Ian Lancaster <ilancaster@gmail.com>
clustal-omega: add 1.2.0 bottle.
clustal-w: fails with gcc-4.2

Closes #1496.

Signed-off-by: Ian Lancaster <ilancaster@gmail.com>
clustal-w: add 2.1 bottle.