package/archlinux: don't build the Sokol Triangle example on AUR.
package/archlinux: don't build the Sokol Triangle example on AUR.

It works only if Magnum is built with MAGNUM_TARGET_GL disabled...

mosra/magnum-examples,mosra/magnum-examples,mosra/magnum-examples,mosra/magnum-examples,mosra/magnum-examples,mosra/magnum-examples,mosra/magnum-examples