Daniel Gröber (dxld) authored Jul 10, 2019 and Marge Bot committed Jul 16, 2019

Currently initProfiling gets defined by Profiling.c only if PROFILING is
defined. Otherwise the ProfHeap.c defines it.

This is just needlessly complicated so in this commit I make Profiling and
ProfHeap into properly seperate modules and call their respective init
functions from RtsStartup.c.