gprofng/testsuite: skip Java test without JDK

gprofng/testsuite: skip Java test without JDK

There's no point in even trying the Java test when gprofng was built
without Java support, and when the building of the constituents of the
testcase also would fail. On such systems this converts the respective
tests from "unresolved" to "unsupported", making the overall testsuite
run no longer report failure just because of this.