[SYCL] Using NoSignedWrap decoration without declaring SPV_KHR_no_integer_wrap_decoration

[kpet]

Building the simple app from the doc results in an invalid SPIR-V module. The NoSignedWrap decoration is used but the SPV_KHR_no_integer_wrap_decoration isn't declared with an OpExtension. Declaring the extension is enough to make the module pass the validator.

[bader]

Looks like an issue of LLVM/SPIR-V translator. I'll create another issue there.
Thanks for reporting it.