Fixed str bug in get_ocl_kernel_source_file_info
Cleaning up gpu_utils
Avoided overloading by using different function names
Enabled and fixed some problems with the compiler
Merge branch 'asc' into dk-dev

Conflicts:
	src/gromacs/gmxlib/gpu_utils/gpu_utils.cpp
Remove AMD specific option for kernel compilation as it was not needed anymore
Fixed an issue with the build error not being reported correctly