Add separate libstdc++6_5.4.0, need for Hugo extended version

Dockerfile

@@ -326,6 +326,11 @@ RUN binrc install spf13/hugo 0.17 -c /opt/buildhome/.binrc | xargs -n 1 -I{} ln
     binrc install spf13/hugo 0.48 -c /opt/buildhome/.binrc | xargs -n 1 -I{} ln -s {} /usr/local/bin/hugo_0.48 && \
     ln -s /usr/local/bin/hugo_0.17 /usr/local/bin/hugo
 
+RUN mkdir /opt/buildhome/stdc++6 && \
+    wget -q -O libstdc++6.deb http://security.ubuntu.com/ubuntu/pool/main/g/gcc-5/libstdc++6_5.4.0-6ubuntu1~16.04.10_amd64.deb && \
+    dpkg -x libstdc++6.deb /opt/buildhome/stdc++6 && \
+    rm -fr libstdc++6.deb
+
 ################################################################################
 #
 # Clojure

run-build-functions.sh

@@ -440,6 +440,10 @@ install_dependencies() {
     if [ $? -eq 0 ]
     then
       export PATH=$(dirname $hugoOut):$PATH
+      if [ $(awk 'BEGIN {print ("'$HUGO_VERSION'" >= "'0.43'")}') -eq 1 ] ; then
+        grep "hugo=" /opt/buildhome/.bashrc || \
+          echo "alias hugo='LD_LIBRARY_PATH=/opt/buildhome/stdc++6/usr/lib/x86_64-linux-gnu hugo'" >> /opt/buildhome/.bashrc
+      fi
     else
       echo "Error during Hugo $HUGO_VERSION install: $hugoOut"
       exit 1