This cset implements half the changes required for Rusty's in-kernel
module loader.  It implements the basic principles required to link
a module with other modules and the kernel, as well as providing the
required functions to allow the kernel to build with CONFIG_MODULES=y.

However, as an unfortunate side effect, this cset DISABLES the
ability to load modules on ARM; it's currently broken since we need
to allocate a jump table for out of range branches (which is required
for most calls from modules to the kernel binary to work.)

Since we don't know the size of the jump table until we come to link
the module, a subsequent vmalloc could return memory no where near
the module itself, giving the same problem.