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

@@ -282,10 +282,11 @@
         preadv.o                \
         priocntlset.o           \
         processor_bind.o        \
         processor_info.o        \
         profil.o                \
+        psecflagsset.o          \
         putmsg.o                \
         putpmsg.o               \
         pwrite.o                \
         pwritev.o               \
         read.o                  \

@@ -554,10 +555,11 @@
         posix_madvise.o         \
         posix_memalign.o        \
         priocntl.o              \
         privlib.o               \
         priv_str_xlate.o        \
+        psecflags.o             \
         psiginfo.o              \
         psignal.o               \
         pt.o                    \
         putpwent.o              \
         putspent.o              \