OpenCL builds are broken on Mac OS - Redmine #2369

Archive from user: Erik Lindahl

git bisect blames Mark’s commit b08ab12c.

(from redmine: issue id 2369, created on 2017-12-29 by gmxdefault, closed on 2018-01-02)

• Changesets:
  • Revision 628529d0 by Erik Lindahl on 2018-01-02T17:08:08Z:

Fix OpenCL compiles on Mac OS

Confirmed to work on Mac OS 10.13.2 running
on a Macbook Pro with Radeon Pro 560.

Fixes #2369.

Change-Id: I0b0056075ecbaf7c11e0022ed13e43cfe2e7484c