Merge changes I105876bb,I2d7f59a2,I274cbe98,I0fb4e506,I868f7563

* changes:
  fix broken build due to dummy source file no longer being needed.
  Adding apache-harmony tests to libcore as a separate plan.
  Fix paths in starttests script.
  Moving from oatexec to dalvikvm
  Restore vm-tests-tf script so vm test suite can be run from commandline.