Added support for Hygon Dhyana CPU architecture

Support for hardware detection and related heuristics has been implemented for the Hygon Dhyana derived from the first-gen AMD Zen which it shares most of its architectural details with.

Enabled PME offload support with OpenCL on NVIDIA and Intel GPUs

Thanks to portability improvements, the previously disabled PME OpenCL offload is now enabled also on NVIDIA and Intel GPUs.

Fixed building on Solaris with GCC

GROMACS now builds on Solaris with GCC (tested on illumos distribution openindiana, “Hipster” rolling release, using GCC 5, 6, 7, and 8).