[LLDB] Skip TestDataFormatterStdUniquePtr.py on arm/linux

TestDataFormatterStdUniquePtr.py fails on lldb arm/aarch64 linux
buildbot but not reproducible on test machine. Skipping for now.

lldb/test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/unique_ptr/TestDataFormatterStdUniquePtr.py

@@ -13,6 +13,7 @@ class StdUniquePtrDataFormatterTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     @add_test_categories(["libstdcxx"])
+    @skipIf(oslist=["linux"], archs=["arm", "aarch64"])
     def test_with_run_command(self):
         self.build()
         self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)