Report the correct number of tests when tests are skipped due to compile time errors.

Report the correct number of tests when tests are skipped due to compile time errors.

The current setup will count tests that are skipped when runtime is a browser due to compile time errors twice. Example:
tools/test.py -mrelease -rdrt -cdart2js --report language/bad_override
<snip>
Total: 10 tests
 * 0 tests will be skipped (0 skipped by design)
 * 0 tests are expected to be flaky but not crash
 * 5 tests are expected to pass
 * 0 tests are expected to fail that we won't fix
 * 2 tests are expected to fail that we should fix
 * 0 tests are expected to crash that we should fix
 * 0 tests are allowed to timeout
 * 3 tests are skipped on browsers due to compile-time error

This is a multitest that has 7 tests (including none). 3 of these are giving compile-time errors, 2 of these are failing (as a compile-time error when they should not, but that is not the point), 2 are passing.

This is preparation of a bigger refactoring of the summary reporting, so that I can have sane numbers for validation.

R=kustermann@google.com

Committed: https://code.google.com/p/dart/source/detail?r=42460

[kustermann, 2014-12-18 15:09:44]

lgtm

[The testoutcome.log files we write give the most accurate information about
test runs. The information in them can even be used to deflake the status files
:) Personally, I would probably use them as a source of truth instead.]

[ricow1, 2014-12-18 15:14:23]

On 2014/12/18 15:09:44, kustermann wrote:
> lgtm
> 
> [The testoutcome.log files we write give the most accurate information about
> test runs. The information in them can even be used to deflake the status
files
> :) Personally, I would probably use them as a source of truth instead.]

Indeed, but it is would be very very nice to be able to produce the numbers for
this without having to aggregate data from multiple sources and do this with the
--list parameter. I will use the testoutcome files to validate the numbers

[ricow1, 2014-12-18 15:15:16]

Committed patchset #1 (id:1) manually as r42460 (presubmit successful).