* [Script] release preparing:

1. add missing modules in package.json
2. move html5 folder to runtime folder in release_file.rules
3. modify js-framework path in build_from_source.sh
4. add NDK environment setup to HOW-TO-BUILD.md
diff --git a/HOW-TO-BUILD.md b/HOW-TO-BUILD.md
index 0cfc0ea..18f56ca 100644
--- a/HOW-TO-BUILD.md
+++ b/HOW-TO-BUILD.md
@@ -15,7 +15,6 @@
     * NodeJS 4.0+
     * JDK 1.6+
     * Android SDK(`$ANDROID_HOME` must be set properly)
-    * Android NDK(version <= 16, `$ANDROID_NDK` must be set properly)
     * Gradle 2.0+
     * NDK r16
     * CMake 3.9.0+
diff --git a/scripts/release_files.rules b/scripts/release_files.rules
index 4d1831c..4ecdcf3 100644
--- a/scripts/release_files.rules
+++ b/scripts/release_files.rules
@@ -52,7 +52,7 @@
 + /android
 + /android/build.gradle
 + /android/sdk/
-- /android/sdk/assets/main.js
+- /android/sdk/assets/*.js
 - /android/sdk/.gradle
 - /android/sdk/build
 - /android/sdk/NOTICE