Implement enough JDWP functionality that we can attach jdb.

You can also try "classes" and "classpath", though anything else
deadlocks because we're suspended but jdb thinks we aren't. I don't
think that's a new bug with this patch, though, so I'll look at that

Change-Id: I54456b6a7fe72642be696c66aa485dc0c8a7f913
11 files changed
tree: 4d6baa6e24d41027300bd22a7b7746267dd45f23
  2. build/
  3. oat_process/
  4. oat_runtime/
  5. src/
  6. test/
  7. tools/