message: Un-XFAIL TestExitDuringBreak.py for linux
  This test is passing now on linux, and probably has been passing since
  r282993.
diff: @@ -23,9 +23,6 @@ class ExitDuringBreakpointTestCase(TestBase):
  # Find the line number for our breakpoint.
  self.breakpoint = line_number('main.cpp', '// Set breakpoint here')
  - @expectedFailureAll(
  - oslist=["linux"],
  - bugnumber="llvm.org/pr15824 thread states not properly maintained")
  def test(self):
  """Test thread exit during breakpoint handling."""
  self.build(dictionary=self.getBuildFlags())
  