[lldb] Enable TestCppBitfields on Windows

[werat]

Summary

The test works correctly on Windows, the linked bug has been resolved.

[teemperor]

Sorry, I meant you can just commit this without review :)

(also you probably want to actually remove the skipIf)

[werat]

remove the @skip

[werat]

Accidentally included only two out of three lines in the commit :)

lldb/test/API/lang/cpp/bitfields/TestCppBitfields.py

class CppBitfieldsTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     def setUp(self):
         # Call super's setUp().
         TestBase.setUp(self)
         # Find the line number to break inside main().
         self.line = line_number('main.cpp', '// Set break point at this line.')
 
-    # BitFields exhibit crashes in record layout on Windows
-    # (http://llvm.org/pr21800)
-    @skipIfWindows
     def test_and_run_command(self):
         """Test 'frame variable ...' on a variable with bitfields."""
         self.build()
 
         lldbutil.run_to_source_breakpoint(self, '// Set break point at this line.',
           lldb.SBFileSpec("main.cpp", False))
 
         # The stop reason of the thread should be breakpoint.