Add gcc-4.8 to the rpi_wheezy image

docker/Dockerfile_rpi_wheezy

@@ -21,6 +21,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends \
       python-pip \
       git \
       gcc \
+      gcc-4.8\
+      libstdc++-4.8-pic\
       libssl-dev \
       libyaml-dev \
       libffi-dev \