naev-steamruntime: Ensure bindgen makes it to the final image

naev-steamruntime/Dockerfile

@@ -30,7 +30,6 @@ RUN curl -L -O https://github.com/adah1972/libunibreak/releases/download/libunib
 RUN apt-get -y install \
         autoconf \
         automake \
-        bindgen \
         build-essential \
         cmake \
         git-core \
@@ -107,6 +106,8 @@ ENV IMAGE_NAME "naev-steamruntime"
 RUN DEBIAN_FRONTEND=noninteractive apt-get install -y python3-pip \
 # Install runtime dependencies for luarocks
     lua5.4 \
+# Install bindgen for building naev
+    bindgen \
 # Naughty: we need libluajit-5.1-dev, libglpk-dev and libsuitesparse-dev, not in the SDK.... All are statically linked when building with the steamruntime option in meson set to true. Also, texinfo is an accidental build dependency for libbfd.
     libluajit-5.1-dev libglpk-dev libsuitesparse-dev texinfo && \
     apt-get clean && \