When both gles2 and opengl options are enabled, RetroArch will only
build with OpenGL ES support. This prevents OpenGL only cores from working.
Disable gles2 by default and use the glcore driver which provides OpenGL 3.2+
and OpenGL ES 3+ support. Fixes: #32246
libusb support is automatic and is currently pulled in when sdl2 is enabled.
Add it to makedepends to ensure it's always enabled.
RetroArch will call xdg-screensaver when it's built with X11 support.
Add xdg-utils to depends when the x11 option is enabled.
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