I'd like to report that the new OpenGL SDK 3.1 is missing the all DLLs.
Inside the GLES_SDK_v31.zip there are place holder files with text like this one:
Microsoft Forefront Protection for Exchange Server removed a file since it was found to match a filter.
File name: "winmail.dat->GLES_SDK_v31.zip->libEGL.dll"
Filter name: "FILE FILTER= AMD Delete: *"
I guess it was removed by some email filter at AMD.
The missing files are: