doc: change the build guide path (#1332)

README.md

@@ -82,7 +82,7 @@ To run sample scenes on your mobile devices, you need to place required models p
 > :warning: In most cases, you don't need to build the plugin by yourself. Only if the pre-built package doesn't work for you, please build the plugin by yourself.
 
 This repository **doesn't include required libraries or models**, so if you clone this repository, you need to build the plugin by yourself.\
-See [the build guide](./docs/build/README.md) for more details.
+See [the build guide](./docs/Build.md) for more details.
 
 ## Build a package by yourself
 

docs/build/README.md → docs/Build.md

@@ -382,11 +382,12 @@ If native libraries (`libmediapipe_c.{so,dylib,dll} / mediapipe_android.aar / Me
 
 1.  Native libraries are incompatible with your device
 
-1.  Libraries built on Linux machines (`libmediapipe_c.so`) won't work on your Windows machine.
-1.  If it occurs on your Android device, maybe
+   -  Libraries built on Linux machines (`libmediapipe_c.so`) won't work on your Windows machine.
+   -  If it occurs on your Android device, maybe
 
-    - the architecture is wrong (`--android armv7`) or
-    - the API Level is not compatible (specify the `--android_ndk_api_level` option when running the [build command](#build-command))
+      - the architecture is wrong (`--android armv7`) or
+      - the API Level is not compatible (specify the `--android_ndk_api_level` option when running the [build command](#build-command)) or
+      - `libc++_shared.so` is not bundled with your apk(cf. [README](../README.md#for-android))
 
 1.  Dependent libraries are not linked