ci/linux: add an OpenGLES 3.0 job
ci/linux: add an OpenGLES 3.0 job

Adds an OpenGLES 3.0 job as it is the last version of OpenGLES supported
on iOS. It also has the advantage to test UBO support on a GLSL version
that does not support explicit binding and locations.

gopro/gopro-lib-node.gl,gopro/gopro-lib-node.gl,gopro/gopro-lib-node.gl,gopro/gopro-lib-node.gl