Adds checking for 32-bit/64-bit instead of specific JRE versions. This change makes it possible for Snow Leopard users to use hosted mode using the 32-bit 1.6 JRE. Review by: jat git-svn-id: https://google-web-toolkit.googlecode.com/svn/releases/1.7@6144 8db76d5a-ed1c-0410-87a9-c151d255dfc7