Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/rasta/issue_000042.dart.dartk.expect

-library;
-import self as self;
-import "dart:core" as core;
-
-static method main() → dynamic {
-  invalid-statement;
-  {
-    invalid-statement;
-  }
-  if(true) {
-    invalid-statement;
-  }
-  #L1:
-  switch(1) {
-    #L2:
-    case 1:
-      invalid-statement;
-    #L3:
-    case 2:
-      break #L1;
-  }
-  try {
-  }
-  on core::NoSuchMethodError catch(no-exception-var) {
-  }
-}