Changeset 259 for soft/giet_vm/giet_libs/stdlib.h

giet_fat32/fat32.c :
Added _fat_write function. At the moment it does not support the creation of a
new file (the writing must exist in the disk image) and does not support the
allocation of additional cluster from the original file.

create_dmg :
Bug fix for support Linux (The tree files were not consistent with the
pathnames in boot.c).

giet_libs/stdlib.c and stdlib.h :
Added stdlib file. At the moment they only contain the atoi function.

giet_libs/stdio.h :
Bug fix in SYSCALL DEFINE. SYSCALL_FAT_READ, WRITE, CLOSE, LSEEK had the same
value.

Makefile :
Added compilation line for stdlib.o