Refactored ksecprintf -> secprintf. Secure code is now all in common libtest161.

This library gets linked in by default in userland, and the common files are
included in the kernel.

kern/include/test.h

@@ -178,13 +178,6 @@ int ll1test(int, char **);
 int ll16test(int, char **);
 #endif
 
-#define SUCCESS 0
-#define FAIL 1
-
-int success(bool, const char *, const char *);
-
-int ksecprintf(const char *secret, const char *msg, const char *name);
-
 void random_yielder(uint32_t);
 void random_spinner(uint32_t);