Tidy up state machine coverage tests.

Rather than duplicate all the various modifiers, which is quite
error-prone, write all the tests to a temporary array and then apply
modifiers afterwards.

Change-Id: I19bfeb83b722ed34e973f17906c5e071471a926a
Reviewed-on: https://boringssl-review.googlesource.com/4782
Reviewed-by: Adam Langley <agl@google.com>
1 file changed