nvidia's EGL stack looks for libGLESv2.so.2 at runtime (confirmed by watching strace), however builder.sh only provides a libGLESv2.so.1 symlink. @vcunat ported to legacy_340; older ones don't produce GLES.
This is done for the sake of Yosemite, which does not have gcc, and yet this change is also compatible with Linux.
CC: #5070.