zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/build/readme.txt b/build/readme.txt
new file mode 100644
index 0000000..87b81e5
--- /dev/null
+++ b/build/readme.txt
@@ -0,0 +1,2 @@
+1.1 add libffi libiconv  libintl 2023.02.15
+1.2 fix c++ to_string error