Leave TestAttachResume as flakey on linux

there must be (at least) one more race hidden there...

llvm-svn: 251950

lldb/packages/Python/lldbsuite/test/functionalities/attach_resume/TestAttachResume.py

@@ -20,6 +20,7 @@ class AttachResumeTestCase(TestBase):
     @skipIfRemote
     @expectedFailureFreeBSD('llvm.org/pr19310')
     @expectedFailureWindows("llvm.org/pr24778")
+    @expectedFlakeyLinux('llvm.org/pr19310')
     def test_attach_continue_interrupt_detach(self):
         """Test attach/continue/interrupt/detach"""
         self.build()