hooklib/dll.c: Add dynamic loader hook mechanism

hooklib/dll.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "hook/table.h"
+
+struct dll_symbol {
+    void *ptr;
+    const char *name;
+    uint16_t ordinal;
+};
+
+HRESULT dll_hook_push(
+        HMODULE redir_mod,
+        const wchar_t *name,
+        const struct hook_symbol *syms,
+        size_t nsyms);