💚 Add new dependency to docker libssl-dev

So this way we will get hostpython's _ssl module build,
and we will be able to use hostpython's pip without security errors.

Author: opacam

Dockerfile

@@ -66,6 +66,7 @@ RUN dpkg --add-architecture i386 \
     libncurses5:i386 \
     libpangox-1.0-0:i386 \
     libpangoxft-1.0-0:i386 \
+    libssl-dev \
     libstdc++6:i386 \
     libtool \
     openjdk-8-jdk \