Fix: cargo ndk

Author: develon2015

android/build_by_cargo_ndk

@@ -1,6 +1,6 @@
 if [[ $(uname -o) == "Cygwin" ]]; then
     echo "Running in Cygwin"
-    ANDROID_NDK_HOME="D:\AS_SDK\ndk\25.1.8937393"
+    export ANDROID_NDK_HOME="D:\AS_SDK\ndk\25.1.8937393"
     APP="E:\Github\tcp2ws-apk\app\src\main"
     OUTDIR="$APP\jniLibs"
     # IS_RELEASE="--release"