minor updates to published Intel extensions

[bashbaug]

This PR includes minor updates to published Intel extensions:

• Build with the latest style sheets and Makefile
• Update copyright dates: https://github.com/KhronosGroup/OpenCL-Docs/pull/881
• Include hyphenation changes for consistency: https://github.com/KhronosGroup/OpenCL-Docs/pull/902
• Any other changes to the spec source since these extensions were last published!