Bug#1104979: glmark2-es2-* packages don't pull in libgles2 as dependency

[Nicolas Frattaroli]

Package: glmark2-es2-drm
Version: 2023.01+dfsg-1

When installing glmark2-es2-wayland, or glmark2-es2-drm, or glmark2-es2-x11,
the package libgles2 is not pulled in as a dependency. As a result,
glmark2-es2-* cannot run, and prints the following error:

$ glmark2-es2-drm
Warning: DRM_CAP_ASYNC_PAGE_FLIP not supported, falling back to 'mailbox' mode for SwapInterval(0).
Error: Error loading GL library
Error: main: Could not initialize canvas