Add regression tests from Luke's bug reports. Part 1.

pkg/front_end/testcases/regress/issue_29981.dart.outline.expect

Index: pkg/front_end/testcases/regress/issue_29981.dart.outline.expect
diff --git a/pkg/front_end/testcases/regress/issue_29981.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29981.dart.outline.expect
new file mode 100644
index 0000000000000000000000000000000000000000..baed3e540af57ebd8b1f5bdc894ed411436d5502
--- /dev/null
+++ b/pkg/front_end/testcases/regress/issue_29981.dart.outline.expect
@@ -0,0 +1,11 @@
+library;
+import self as self;
+import "dart:core" as core;
+
+class C<T extends core::Object> extends core::Object {
+  field self::C<core::String> field;

[Johnni Winther, 2017/06/23 10:51:44]

Why `C<String>` and not `C<dynamic>` as type? What about the opposite case
`Map<String>` ?

[ahe, 2017/06/23 12:21:51]

I haven't put much though into this. C<dynamic> seems like throwing information
away. And for Map<String>, think we should generate Map<String, dynamic>, but
I'm not sure. Would you mind filing a bug if you have any concerns about this?

[Johnni Winther, 2017/06/23 12:24:22]

In dart2js we use dynamic (we discussed it a long time ago when implementing
malformed types)

+  constructor •() → void
+    ;
+}
+static method main() → dynamic
+  ;