uts: add a concept of a 'default' set of privileges, separate from 'basic'

@@ -983,10 +983,11 @@
                 posix_spawnp.3c                         \
                 printstack.3c                           \
                 priv_allocset.3c                        \
                 priv_basicset.3c                        \
                 priv_copyset.3c                         \
+                priv_defaultset.3c                      \
                 priv_delset.3c                          \
                 priv_emptyset.3c                        \
                 priv_fillset.3c                         \
                 priv_freeset.3c                         \
                 priv_getbyname.3c                       \

@@ -1950,10 +1951,11 @@
 sprintf.3c                              := LINKSRC = printf.3c
 
 priv_allocset.3c                        := LINKSRC = priv_addset.3c
 priv_basicset.3c                        := LINKSRC = priv_addset.3c
 priv_copyset.3c                         := LINKSRC = priv_addset.3c
+priv_defaultset.3c                      := LINKSRC = priv_addset.3c
 priv_delset.3c                          := LINKSRC = priv_addset.3c
 priv_emptyset.3c                        := LINKSRC = priv_addset.3c
 priv_fillset.3c                         := LINKSRC = priv_addset.3c
 priv_freeset.3c                         := LINKSRC = priv_addset.3c
 priv_intersect.3c                       := LINKSRC = priv_addset.3c