This update for glmark2 fixes the following issues:

glmark2 was updated to version 20210830:

* GLStateEGL: Support EGL versions < 1.4
* Fix model loading on big endian.
* Fix -Wunreachable-code-aggressive.

Update to version 20210521:

* glad: Update for GL 2.1 + GL_EXT_framebuffer_object
* Gracefully handle missing GL features
* NativeStateWayland: Improve surface configuration handling

Update to version 20210224:

* SceneRefract: Fix incorrect generation of mipmap
* NativeStateWayland: Don't assume order of globals
* GLStateEGL: Avoid creating two EGLDisplay instances
* Build,Doc: Update files for 2021.02 release
* Build: Remove invalid build flavors for meson
* NativeStateWayland: Support quitting with ESC or Q key
* NativeStateWayland: Add basic pointer support
* CanvasGeneric: avoid undefined behavior constructing a std::string with NULL
* libmatrix: declare Shader::Shader(Shader&&) as noexcept
* libmatrix: add move constructor to class Shader for v.push_back opt
* build: glmark2 does not really require libpng version 16
* SceneBump: Fix precision bug in height rendering
* SceneDesktop: Draw to correct FBO in off-screen mode
* SceneShadow: Draw to correct FBO in off-screen mode
* SceneRefract: Draw to correct FBO in off-screen mode
* SceneTerrain: Draw to correct FBO in off-screen mode
* CanvasGeneric: End the frame with glFinish when validating
* Build: Use the build system wayland-scanner on meson
* Build: Fix drm-only and wayland-only builds on meson
* loop,function,conditionals: Fix mediump overflow
* terrain: Fix precision handling in noise shader
* terrain: Fix precision bug in light rendering
* Doc: Document that the -b flag can pass common opts
* Doc: Update files for meson build system
* ci: Add build github workflow
* Build: Meson build system support
* Build: Use python3 in waf
* NativeStateWayland: Fix no response to wayland server ping event.
* Check for proper initialization of native_window and MVC matrix
* egl: Ensure eglReleaseThread is valid before calling it
* drm: Don't prefer RGBA component widths larger than 8

Update to version 20200503:

* Build: Fix Python 3 incompatibility
* Build,Doc: Update files for 2020.04 release
* doc: Update --data-path documentation entry
* Build: Improve configure error message when no flavors are selected
* Android: Add fastlane metadata for F-Droid release
* Android: Add unofficial adaptive icon for the android 8+ release
* Android: Add unofficial icon for the android release
* Android: Remove old drawables with non standard names
* Android: Add different resolution of drawable and use sdk name for it
* Fix UTF-8 in copyright headers
* Allow version string suffix
* Port Wayland to xdg-shell window management
* Allow flavours to generate their own source files
* Add support for Wayland display-scale events
* glad: Update to latest upstream version
* glad: Add README