add field for kvm descriptor.

* glibtop_machine.h: add field for kvm descriptor.

        * open.c: add code for opening kernel name space.

        * shm_limits.c: implemented.

The real implementation will have this code in the daemon, since process
needs to be setgid sys to be able to read kernel symbols.

sysdeps/solaris/glibtop_machine.h

@@ -29,6 +29,7 @@
 #include <fcntl.h>
 
 #include <kstat.h>
+#include <kvm.h>
 #include <sys/sysinfo.h>
 
 BEGIN_LIBGTOP_DECLS
@@ -40,6 +41,8 @@ struct _glibtop_machine
     uid_t uid, euid;
     gid_t gid, egid;
 
+    kvm_t *kd;
+
     kstat_ctl_t *kc;
     
     kstat_t *vminfo_kstat;