Add dart analyzer test suite 'analyze_library' that fails if we

Add dart analyzer test suite 'analyze_library' that fails if we
introduce static type warnings in certain dart libraries.

I wanted this for dart:io and might as well add it for the other
libraries that have no warnings when analyzed.

This required a bit of test script reworking. dartc used a leading
hash in a file to determine if it was a test. That is now broken
and has been removed. This also allowed me to override the 
readOptionsFromFile method in test suites so that certain analyzer
test suites can require all tests to be static clean.

R=ricow@google.com,kustermann@google.com,sgjesse@google.com,danrubel@google.com
BUG=

Committed: https://code.google.com/p/dart/source/detail?r=19597

[Søren Gjesse, 2013-03-06 14:19:56]

lgtm

[ricow1, 2013-03-06 14:23:25]

LGTM

https://codereview.chromium.org/12475004/diff/1/tools/testing/dart/test_suite...
File tools/testing/dart/test_suite.dart (right):

https://codereview.chromium.org/12475004/diff/1/tools/testing/dart/test_suite...
tools/testing/dart/test_suite.dart:1542: {bool this.allStaticClean: false})
we don't have to have this as a constructor parameter, we could just set it in
the constructor of the specialized AnalyzeLibraryTestSuite

[Mads Ager (google), 2013-03-06 14:26:41]

https://codereview.chromium.org/12475004/diff/1/tools/testing/dart/test_suite...
File tools/testing/dart/test_suite.dart (right):

https://codereview.chromium.org/12475004/diff/1/tools/testing/dart/test_suite...
tools/testing/dart/test_suite.dart:1542: {bool this.allStaticClean: false})
On 2013/03/06 14:23:25, ricow1 wrote:
> we don't have to have this as a constructor parameter, we could just set it in
> the constructor of the specialized AnalyzeLibraryTestSuite 

That is true. I like having it as a constructor parameter so  it is set in the
class that uses it.

[kustermann, 2013-03-06 14:45:21]

lgtm

[danrubel, 2013-03-06 17:07:15]

lgtm

[Mads Ager (google), 2013-03-07 07:25:42]

Committed patchset #2 manually as r19597 (presubmit successful).