Add verification of knownfailures in the testrunner

Add verification checks in testrunner for
knownfailures entries.
Removed 554-jit-profile-file, 555-checker-regression-x86const entries,
as it doesn't exist anymore.

Also, unified the format of entries to use tests for all the
cases.

Bug: 36164293
Test: ./art/test/testrunner/testrunner.py --host -64
Change-Id: I2fb4d1a3dd34b76d314323db17c8a1c771545b28