Completely replace ax_java.m4 with ax_javac_and_java, which is
a clean-room implementation of an autoconf macro to detect Java.
It has some limitations compared to the ax_java macros in
The Autoconf Macro archive, but it has two key advantages.
It is not GPL-licensed. It doesn't abort configure if Java is
not found.
git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@753428 13f79535-47bb-0310-9956-ffa450edef68