Build fail with MacOs in connectivity part

[Tor Lillqvist]

> I had to comment every Mysql/MariaDB options since brew (a repository
> manager) freezed to install mysql connector

Please avoid all 3rd-party software packages when building LO for OS
X. Using such is not supported and will often lead to build problems.

(Unfortunately, yes, this currently means you have to install at least
autoconf and automake yourself, and also "manually" take care of some
Java bits like Ant and Junit, if you insist on building with Java
support.)

--tml