Fix link error with d_lib.cpp & mark as matching

include/toBeSorted/d_lib.h

@@ -1,11 +1,20 @@
 #ifndef D_LIB_H
 #define D_LIB_H
 
-namespace dLib {
+#include "common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern u32 lbl_80574FA0;
+extern u32 lbl_80574FA4;
 
 void unknownStub();
-bool strequals(const char *str1, const char *str2);
+bool strequals(const char *lhs, const char *rhs);
 
-}; // namespace dLib
+#ifdef __cplusplus
+}
+#endif
 
 #endif // D_LIB_H