install swig

docker/android-ndk/Dockerfile

@@ -23,7 +23,7 @@ RUN apt-get update -qq && \
 
 # JNI build dependencies w/ 32-bit compatible C libs
 RUN apt-get update -qq && \
-    apt-get -y install docker-ce docker-ce-cli make gcc file lib32stdc++6 lib32z1 \
+    apt-get -y install docker-ce docker-ce-cli make gcc swig file lib32stdc++6 lib32z1 \
     autoconf autogen automake autopoint autotools-dev gettext-base libtool patch pkg-config && \
     apt-get clean && \
     apt-get autoclean && \