Log Message:
Update glmark2 to 2020.04

No longer requires python 2.7

glmark2 2020.04 (20200428)
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* Port Wayland flavor to xdg-shell window management.
* Support recent Android SDK/NDK versions.
* Add support for Windows via WGL and ANGLE-EGL.
* Support Raspberry Pi's dispmanx.
* Use glad for GL headers and dynamic GL library loading.
* Add --data-path command-line option to set data path at runtime.
* Add 'nframes' scene option to limit the number of rendered frames.
* Add F-Droid/fastlane metadata.