lockstat: Fix construction of comparision predicates

Passing "0x%p" to sprintf results in double "0x" being printed.
This causes a dtrace script compilation failure when "-d" flag
is specified.
Fix that by removing the extraneous "0x".

Reviewed by:	markj
Approved by:	mw(mentor)
Obtained from:	Semihalf
Sponsored by:	Alstom
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D35690

cddl/contrib/opensolaris/cmd/lockstat/lockstat.c

@@ -606,14 +606,14 @@ predicate_add(char **pred, char *what, char *cmp, uintptr_t value)
 
 	if (*pred[0] != '\0') {
 		if (cmp != NULL) {
-			(void) sprintf(new, "(%s) && (%s %s 0x%p)",
+			(void) sprintf(new, "(%s) && (%s %s %p)",
 			    *pred, what, cmp, (void *)value);
 		} else {
 			(void) sprintf(new, "(%s) && (%s)", *pred, what);
 		}
 	} else {
 		if (cmp != NULL) {
-			(void) sprintf(new, "%s %s 0x%p",
+			(void) sprintf(new, "%s %s %p",
 			    what, cmp, (void *)value);
 		} else {
 			(void) sprintf(new, "%s", what);