LibC: Add stubs for some functions in {dlfcn,ftw,utime,wchar}.h

userspace/libraries/LibC/utime.cpp

@@ -0,0 +1,8 @@
+#include <BAN/Assert.h>
+
+#include <utime.h>
+
+int utime(const char*, const struct utimbuf*)
+{
+	ASSERT_NOT_REACHED();
+}