README: Add autoconf and libtool as required MSYS2 packages

Author: longnguyen2004

README.md

@@ -82,7 +82,7 @@ Building in MSYS2
 
 To build in MSYS2, install the following set of packages with `pacman -S --needed`:
 
-    git wget mingw-w64-x86_64-gcc mingw-w64-x86_64-ninja mingw-w64-x86_64-cmake make mingw-w64-x86_64-python3
+    git wget mingw-w64-x86_64-gcc mingw-w64-x86_64-ninja mingw-w64-x86_64-cmake make mingw-w64-x86_64-python3 autoconf libtool
 
 
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