added with-oci and with-mariadb to build QtSql with Oracle DB and with mariadb

added --with-oci to compile QtSql with Oracle db engine
added --with-mariadb to have possibility to build qt5 using installed mariadb (--with-mysql wants to remove mariadb and install mysql)
Of course formula can bail out with message before, but I didn't found anything in formulas like:
if not ENV['ORACLE_HOME'] then die "You have to set ORACLE_HOME=..."