Updated with new cpptask that replaces <getJdk> with <verifyJdk> to
simply much of the JRE locating work. Replaced "jdk.default.PLATFORM"
with "jdk.home.PLATFORM" all through the project, again, removing an
unnecessary additional layer. The locations specified in the build
properties (or local properties) are now expected to point to valid
locations, and those are what is used for packaging.