fixes problem with ODBC on OS X 10.9 Mavericks

Since Apple has removed iODBC from the default OS X 10.9 Mavericks installation I tried to compile Erlang R16B02 with unixODBC.
Even with installed unixODBC and specified --with-odbc=[path to my unixODBC] option Erlang R16B02 still uses iODBC (because Apple has left some iODBC binaries):

1> odbc:start().
ok
2> odbc:connect("",[]).
{error,"[iODBC][Driver Manager]No data source or driver specified, dialog prohibited SQLSTATE IS: IM007 Connection to database failed."}