Fix epuzanovv merge request for glue_egl branch

[epuzanovv EGL](https://github.com/epuzanov/coin/tree/glue_egl)

There is an existing merge request against this branch. Bring the glue_egl request from epuzanovv current to the HEAD of the coin repository. Then make merge request against a new synchronization branch that can be used prior to merging it with HEAD.