OpenCL: Add HD5000 info.
ARCH_WORD: Always use "long long" for LLP64 and "long" for LP64. We
could currently use "long long" for all of them but the future may
be different.
WIP: Add GPU sensor readings to --list=cuda-devices and
--list=opencl-devices as well as to status output, if required library
can be dynamically loaded.
Merge pull request #523 from magnumripper/gpu-sensors

Add temperature/fan monitoring for GPU
Move auto tune functions to its own source file.
Band aid fix for Intel HD Graphics auto "tune".
Change the "reload" feature to actually just load what other processes
wrote to pot file, instead of aborting and restarting completely. This
is a whole lot faster and enables support for MPI as well.
Use real auto-tune for Intel HD Graphics.