Changed the virt-to-phys debug breakpoint name to break_virtual

Changed l4id_t type to integer to recognise negative id values like L4_ANYTHREAD.
Added an extremely simple script that cleans and builds everything in right order.

Increased boot pmds by one:
This is due to the fact that if the 1MB initial allocation area of the kernel is
not 1MB-aligned, it is ought to be mapped from the middle of one MB to next,
which requires 2 pmds.

	modified:   .gdbinit
	modified:   README
	new file:   buildall.sh
	modified:   include/l4/arch/arm/types.h
	modified:   include/l4/generic/scheduler.h
	modified:   loader/kernel.S
	modified:   loader/main.c
	modified:   loader/mylink.lds
	modified:   loader/start.axf.S
	modified:   src/glue/arm/init.c
	modified:   src/glue/arm/memory.c
	modified:   tasks/fs0/src/bdev.c
	modified:   tasks/mm0/include/kdata.h
	modified:   tasks/mm0/include/vm_area.h
	modified:   tasks/mm0/src/init.c
	modified:   tasks/mm0/src/task.c
	modified:   tools/ksym_to_lds.py
	modified:   tools/l4-qemu

README

@@ -37,7 +37,7 @@ Codezero microkernel: Based on L4 microkernel principles, there are only a few
 system calls and the microkernel provides purely mechanism; threads and address
 spaces, and the methods of inter-process communication between them. Anything
 beyond these are policy and they are implemented in the userspace. Due to this
-rigorously simple design the microkernel can be used to design completely
+rigorously simple design the same microkernel can be used to design completely
 different operating systems. In terms of other features, the microkernel is
 preemptive, and smp-ready. Currently only synchronous communication is
 implemented, but this will change in the near future.