ifconfig: Fix Wformat-security

Change-Id: Ie4cf563f1ac333824932e1154e44d23e5ea046e3
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4482
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

src/bin/network/ifconfig/ifconfig.cpp

@@ -592,7 +592,7 @@ list_interface(const char* name)
 					first = false;
 				}
 				putchar(' ');
-				printf(kFlags[i].name);
+				fputs(kFlags[i].name, stdout);
 			}
 		}
 	}