Move ov000 documentation from Ghidra

libs/c/include/stddef.h

@@ -0,0 +1,8 @@
+#ifndef _C_STDDEF_H
+#define _C_STDDEF_H
+
+#define NULL 0
+
+typedef unsigned int size_t;
+
+#endif

libs/c/include/string.h

@@ -1,8 +1,10 @@
 #ifndef _C_STRING_H
 #define _C_STRING_H
 
-typedef unsigned int size_t;
+#include <stddef.h>
 
+void memcpy(void *dest, void *src, size_t count);
+void memmove(void *dest, void *src, size_t count);
 void memset(void *dest, int ch, size_t count);
 void *memchr(const void *ptr, int ch, size_t count);
 void *memrchr(const void *ptr, int ch, size_t count);