* [infra][jvm] Add Jazzer UBSan support
* [java-example] Reenable and plant UB
* [docs] Mention support for Java UBSan in docs
Also adds a link to the java-example build.sh to the docs.
`java-example` has produced all the expected findings and there are now sufficiently many Java projects with status badges that build failures caused by issues with Jazzer would be noticed quickly.
The java-example project does not pull in any external dependencies, but
rather consists of three basic Java fuzzers that hit a synthetic bug
after a few seconds. The project can be used to verify that ClusterFuzz
correctly handles JVM fuzz targets.
* ExampleFuzzer fails with an assertion.
* ExampleValueProfileFuzzer fails with an exception after a few seconds,
but only if running in value profile mode.
* ExampleFuzzerNative fails with an ASan report.
Fabian Meumertzheim