Update more test for assignment to final variables

Update more test for assignment to final variables

This is a follow-up to
https://code.google.com/p/dart/source/detail?r=26519, as there where
more tests checking assignments to final variables. Changed the
negative tests to multi-tests for running with the analyzer(s).

The latest spec (0.51) says:

Attempting to assign to a final variable anywhere except in its
declaration or in a constructor header will cause a runtime error to
be thrown as discussed below. The assignment will also give rise to a
static warning.

R=ricow@google.com
BUG=7062, 11591, 12184
Committed: https://code.google.com/p/dart/source/detail?r=26583

[Søren Gjesse, 2013-08-23 07:02:55]

On 2013/08/22 13:48:20, Søren Gjesse wrote:

Ping

[Søren Gjesse, 2013-08-23 07:21:55]

Rico could you please take a look?

[ricow1, 2013-08-23 07:32:37]

LGTM

[Søren Gjesse, 2013-08-23 08:15:14]

Committed patchset #2 manually as r26583 (presubmit successful).