Install swig in docker (#547)

bin/all-py.Dockerfile

@@ -6,13 +6,8 @@ SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 RUN apt-get -y update \
     && apt-get install --no-install-recommends -y \
-    unzip \
-    libglu1-mesa-dev \
-    libgl1-mesa-dev \
-    libosmesa6-dev \
-    xvfb \
-    patchelf \
-    ffmpeg cmake \
+    libglu1-mesa-dev libgl1-mesa-dev libosmesa6-dev \
+    xvfb unzip patchelf ffmpeg cmake swig \
     && apt-get autoremove -y \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/* \