GLES-Render files in GBox2D

[corzej]

GLES-Render files in GBox2D occurs O-Linker Error.
I removed GLES-Render.h, GLES-Render.mm from GBox2D and error is gone.
I seem like you had removed it on your past commit.
However, it is included in your last commit.

Thank you

[basilabbassv]

Yea. I am having the very same issue as well.