[llvm] [libsycl] Add lit configuration files and basic test (PR #177407)

[Dmitry Vodopyanov via llvm-commits]

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@@ -0,0 +1,214 @@
+# -*- Python -*-
+
+# Configuration file for the 'lit' test runner.
+
+import os
+import re
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dm-vodopyanov wrote:

Not sure, is it used?

https://github.com/llvm/llvm-project/pull/177407