[GSOC 2014] Multiarch support

[Edson Ticona]

Hi
I am refactoring in such a way that functions relaying on specific
personalities are isolated on its own file. The patch has the concrete
case of printllval function which relies on different architectures
types; I removed it from util.c and inserted the adequate version on
linux/<arch>/autil.c
The Makefile.am has to be updated so that this works.
Furthermore, many definitions in the defs.h have to be moved in a similar way.

Edson