I installed the lib in my system, and OpenCL works. What strikes me is that you experienced a bootloop: I could understand X server not starting, but system rebooting ??   I noticed you must create a user called "odroid" before installing the package, for it to configure properly. So maybe it has something to do with the library not  being configured and therefore symlinks not created.   In short, you can try to copy-paste this into a terminal: sudo adduser --disabled-log