fix image installs

Dockerfile

@@ -7,8 +7,8 @@ RUN sed -i 's@deb.debian.org@apt-cache.lan/deb.debian.org@g' /etc/apt/sources.li
     dpkg --add-architecture armhf && \
     apt-get update -y && \
 	apt-get install -y build-essential dpkg-dev dpkg-cross \
-	devscripts gcc gcc-8 make ccache distcc \ 
-	gcc:armhf gcc-8:armhf && \
+	devscripts gcc make ccache distcc \ 
+	gcc-arm-linux-gnueabihf gcc-arm-linux-gnueabi && \
 	apt-get remove --purge -y exim* && \
 	apt-get autoremove --purge -y && \
 	apt-get clean -y && \