Use S2N_CLOCK_HW instead of CLOCK_MONOTONIC_RAW (#841)
Use S2N_CLOCK_HW instead of CLOCK_MONOTONIC_RAW (#841)

CLOCK_MONOTONIC_RAW fails on some compilers.
colmmacc/s2n,wcs1only/s2n,PKRoma/s2n,alexeblee/s2n,PKRoma/s2n,alexeblee/s2n,gibson-compsci/s2n,PKRoma/s2n,bpdavidson/s2n,colmmacc/s2n,raycoll/s2n,gibson-compsci/s2n,wcs1only/s2n,awslabs/s2n,alexeblee/s2n,awslabs/s2n,gibson-compsci/s2n,raycoll/s2n,PKRoma/s2n,gibson-compsci/s2n,wcs1only/s2n,raycoll/s2n,wcs1only/s2n,wcs1only/s2n,PKRoma/s2n,wcs1only/s2n,gibson-compsci/s2n,gibson-compsci/s2n,awslabs/s2n,wcs1only/s2n,awslabs/s2n,wcs1only/s2n,PKRoma/s2n,bpdavidson/s2n,bpdavidson/s2n,raycoll/s2n,raycoll/s2n,colmmacc/s2n,awslabs/s2n,alexeblee/s2n,raycoll/s2n,colmmacc/s2n,bpdavidson/s2n,PKRoma/s2n,alexeblee/s2n,colmmacc/s2n,bpdavidson/s2n,PKRoma/s2n,bpdavidson/s2n,alexeblee/s2n,colmmacc/s2n,awslabs/s2n