util.c: move printuid to uid.c

This will make further uid/gid fixes simpler.

* util.c (printuid): Move
* uid.c: ... here.

uid.c

@@ -75,3 +75,12 @@ sys_setresuid(struct tcb *tcp)
 	}
 	return 0;
 }
+
+void
+printuid(const char *text, const unsigned int uid)
+{
+	if ((unsigned int) -1 == uid)
+		tprintf("%s-1", text);
+	else
+		tprintf("%s%u", text, uid);
+}

util.c

@@ -503,15 +503,6 @@ printfd(struct tcb *tcp, int fd)
 		tprintf("%d", fd);
 }
 
-void
-printuid(const char *text, const unsigned int uid)
-{
-	if ((unsigned int) -1 == uid)
-		tprintf("%s-1", text);
-	else
-		tprintf("%s%u", text, uid);
-}
-
 /*
  * Quote string `instr' of length `size'
  * Write up to (3 + `size' * 4) bytes to `outstr' buffer.