Krisztián Csordás 879a7fafd7
Fix opengl for SFML
Cmake doesn't find opengl on Ubuntu (tried 18.04, 19.04) even after installing the required system dependencies.

libgl1-mesa-dev works instead of mesa-common-dev, as noted here: https://stackoverflow.com/a/47926071/6597851.
2019-08-16 21:40:44 +02:00
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2019-08-16 21:40:44 +02:00