* Print out the summary of changes directly from running "upload"

deqp_submit: Change diff output to not go through a "git commit"
"git diff"  "git reset" cycle and simplify the output to make it easier
readable. The output is now

testname oldState -> newState

When printed to a terminal the output is colored, and when piping, e.g. to
grep the color escape codes are not printed to make grep work properly.
To filter the result for the current changed outcome (e.g. Pass)

  deqp_submit.py diff .... | grep Pass$

v2: Correct diff for cases when a result value is not known