replacing umlaute and fixing address in headers Haldeneggsteig -> Universitaetsstrasse

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

arm_molly: Add strstr() function to mini C library of arm_molly.

Creating the arm_gem5_image failed because it uses lib/elf/elf32.c but the
mini C library that comes with arm_molly did not feature the strstr() function.

large part of arm gem5 port rewritten, now support multiboot bootloader and dynamic kernel relocation, added a loader for gem5 to mimick a multiboot bootloader