Remove dupes.
Use GLES on arm.

Compiz does:
if (${CMAKE_SYSTEM_PROCESSOR} MATCHES "arm.*" OR NOT GL_FOUND)
    set (BUILD_GLES_DEFAULT ON)
endif ()
.
arm64 probably returns aarch64 instead of "arm.*" so add it too.
Update changelog.
Remove duplicate files.
Put the cmake Modules in the Modules directory.
Update changelog.