Provide our own malloc, free and calloc functions in AROSBootstrap.
Since this is the only executable loaded by Host directly, it's global
functions will be visible for all shared objects loaded by dlopen.
Therefore, AROSBootstrap memory managment routines will be used.
These operations were singlethreaded in libc code and so they have to be
on AROS. This commit fixes random lockups of hosted targets (mostly
visible on slower machines)
git-svn-id: https://svn.aros.org/svn/aros/trunk/AROS@35652 fb15a70f-31f2-0310-bbcc-cdcc74a49acc