[llvm] [SYCL][LLVM] Adding property set I/O library for SYCL (PR #110771)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,268 @@
+//=- SYCLPropertySetIO.h -- models a sequence of property sets and their I/O =//
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arsenm wrote:

```suggestion
//=- SYCLPropertySetIO.h -- models a sequence of property sets ----*- C++ -*-=//
```

https://github.com/llvm/llvm-project/pull/110771