LibC: Define Dl_info_t and add stub for dladdr

userspace/libraries/LibC/include/dlfcn.h

@@ -15,6 +15,18 @@ __BEGIN_DECLS
 #define RTLD_NEXT    ((void*)-1)
 #define RTLD_DEFAULT ((void*) 0)
 
+struct Dl_info
+{
+	const char* dli_fname; /* Pathname of mapped object file. */
+	void*       dli_fbase; /* Base of mapped address range. */
+	const char* dli_sname; /* Sumbol name or null pointer. */
+	void*       dli_saddr; /* Symbol address or null pointer. */
+};
+
+typedef struct Dl_info Dl_info_t; /* POSIX type */
+typedef struct Dl_info Dl_info;   /* Linux type */
+
+int		dladdr(const void* __restrict addr, Dl_info_t* __restrict dlip);
 int		dlclose(void* handle);
 char*	dlerror(void);
 void*	dlopen(const char* file, int mode);