uts: Allow for address space randomisation.
Randomise the base addresses of shared objects, non-fixed mappings, the
stack and the heap.  Introduce a service, svc:/system/process-security,
and a tool psecflags(1) to control and observe it

@@ -49,10 +49,11 @@
          * to specify the real system call number.
          */
 
 #define SYS_syscall     0
 #define SYS_exit        1
+#define SYS_psecflags   2
 #define SYS_read        3
 #define SYS_write       4
 #define SYS_open        5
 #define SYS_close       6
 #define SYS_linkat      7