libc: Stub out rename()

libs/libc/include/stdio.h

@@ -164,6 +164,7 @@ extern "C"
     void perror(const char* str);
 
     int remove(const char* pathname);                     // Not implemented.
+    int rename(const char* oldpath, const char* newpath); // Not implemented.
 
     FILE* tmpfile(void); // Not implemented.
 

libs/libc/src/stdio.cpp

@@ -64,6 +64,11 @@ extern "C"
         NOT_IMPLEMENTED("fscanf");
     }
 
+    int rename(const char*, const char*)
+    {
+        NOT_IMPLEMENTED("rename");
+    }
+
     FILE* tmpfile()
     {
         errno = ENOTSUP;