Publish cl_qcom_perf_hint

[lakshmih]

[CLAassistant]

All committers have signed the CLA.

[lakshmih]

@bashbaug Could you please advise on if this looks good? Is there documentation on how to generate headers from the XML?

[bashbaug]

Instructions to generate extension headers from cl.xml may be found in the "scripts" directory in the OpenCL-Headers repo:

https://github.com/KhronosGroup/OpenCL-Headers/tree/main/scripts

Thanks!

[bashbaug]

Merging as discussed over Slack.