Update EGL and KHR headers to Khronos's current version

Update EGL and KHR headers to Khronos's current version

Updated EGL and KHR headers as is, with one minor patch
applied in the ANDROID section of the eglplatform.h files.
Other files are unmodified from their Khronos version.

Change-Id: I2147df6bf36c7ec4c5cd6d32f8863b512a356112
Reviewed-on: https://swiftshader-review.googlesource.com/11310
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>