Add support for copying coredumps to /tmp

tools/testing/dart/test_progress.dart

Index: tools/testing/dart/test_progress.dart
===================================================================
--- tools/testing/dart/test_progress.dart	(revision 32065)
+++ tools/testing/dart/test_progress.dart	(working copy)
@@ -276,6 +276,31 @@
   }
 }
 
+
+class UnexpectedCrashDumpArchiver extends EventListener {
+  void done(TestCase test) {
+    if (test.unexpectedOutput && test.result == Expectation.CRASH) {
+      var name = "core.dart.${test.lastCommandOutput.pid}";
+      var file = new File(name);
+      if (file.existsSync()) {
+        // Find the binary - we assume this is the first part of the command
+        var binName = test.lastCommandExecuted.toString().split(' ').first;
+        var binFile = new File(binName);
+        var binBaseName = new Path(binName).filename;
+        if (file.existsSync()) {

[Bill Hesse, 2014/01/29 07:01:52]

I think this is always true, since it was true above.  Do you mean if
binFile.existsSync?

[ricow1, 2014/01/29 09:41:38]

yes, thank you

+          var dir = new Path(TestUtils.mkdirRecursive(new Path('/tmp'),

[Bill Hesse, 2014/01/29 07:01:52]

We don't want to use Directory.systemTemp for this?

[ricow1, 2014/01/29 09:41:38]

Done.

+              new Path('coredump_${test.lastCommandOutput.pid}')).path);
+          TestUtils.copyFile(new Path(name), dir.append(name));
+          TestUtils.copyFile(new Path(binName), dir.append(binBaseName));

[Bill Hesse, 2014/01/29 07:01:52]

I hate to see all these new uses of Path go in, but they will be easy to change
whenever we decide to get rid of Path.

[ricow1, 2014/01/29 09:41:38]

Yes I thought about that, but our copy functions take paths so I left it for
consistency

+          print("\nCopied core dump and binary for unexpected crash to: "
+                "$dir");
+        }
+      }
+    }
+  }
+}
+
+
 class SummaryPrinter extends EventListener {
   void allTestsKnown() {
     if (SummaryReport.total > 0) {
@@ -456,6 +481,7 @@
   }
 }
 
+
 class TestFailurePrinter extends EventListener {
   bool _printSummary;
   var _formatter;