Build changes for 7176225: Remove JDBC-ODBC Bridge

[Alan Bateman]

We're jettisoning the legacy JDBC-ODBC bridge from Oracle's jdk8 builds 
and this means updating several make files. Here's the webrev:

http://cr.openjdk.java.net/~alanb/7176225/webrev/

I believe I got everything in the both builds. The only thing that isn't 
clear is the old Def-solaris.gmk and whether MAPFILE_EXCEPTION should be 
defined or set to () as I have it.

Thanks,

-Alan.