[llvm] [libsycl] Add liboffload kernel creation (PR #188794)

[Sergey Semenov via llvm-commits]

================
@@ -19,22 +19,57 @@
 
 #include <detail/device_binary_structures.hpp>
 
+#include <OffloadAPI.h>
+
+#include <map>
----------------
sergey-semenov wrote:

```suggestion
#include <unordered_map>
```

https://github.com/llvm/llvm-project/pull/188794