Fixed a few bugs in dexfuzz:

- Set error level on exit when there are divergences.
- Fix cleanCodeCache not preprending adb shell.
- Fixed clearCache.
- Fixed bug in reading end of try block.
- Fixed bug in shifting try block.
- Fixed a bug reading debug info.

Test: Extract dex files from art-tests as named below and test run commands:
dexfuzz --arm --interpreter --optimizing --repeat=2 --execute --input=seeds/068-classloader.dex
dexfuzz --arm --interpreter --optimizing --repeat=2 --execute --input=seeds/510-checker-try-catch.dex
You should not get errors.

Change-Id: I0e0fb6dc27ef6f828a6427b088f6b2ca36aae243