Use arm64 golang download for aarch64 #72

src/freedombone-image-customise

     if [[ $ARCHITECTURE == *"amd64" || $ARCHITECTURE == "x86_64" ]]; then
         GOARCH=amd64
     fi
-    if [[ $ARCHITECTURE == *"arm"* || $ARCHITECTURE == *"aarch"* ]]; then
+    if [[ $ARCHITECTURE == *"arm"* ]]; then
         GOARCH=armv6l
     fi
+    if [[ $ARCHITECTURE == *"aarch"* ]]; then
+        GOARCH=arm64
+    fi
     if [ ! $GOARCH ]; then
         echo $'System architecture was not specified when installing Go'
         exit 6734378

src/freedombone-utils-go

     if [[ $ARCHITECTURE == *"amd64" || $ARCHITECTURE == "x86_64" ]]; then
         GOARCH=amd64
     fi
-    if [[ $ARCHITECTURE == *"arm"* || $ARCHITECTURE == *"aarch"* ]]; then
+    if [[ $ARCHITECTURE == *"arm"* ]]; then
         GOARCH=armv6l
     fi
+    if [[ $ARCHITECTURE == *"aarch"* ]]; then
+        GOARCH=arm64
+    fi
     if [ ! $GOARCH ]; then
         echo $'No architecture specified'
         ARCHITECTURE=$(uname -m)
-        if [[ $ARCHITECTURE == "arm"* || $ARCHITECTURE == *"aarch"* ]]; then
+        if [[ $ARCHITECTURE == "arm"* ]]; then
             GOARCH=armv6l
             echo $"Using $GOARCH"
         fi
+        if [[ $ARCHITECTURE == *"aarch"* ]]; then
+            GOARCH=arm64
+            echo $"Using $GOARCH"
+        fi
         if [[ $ARCHITECTURE == "amd"* || $ARCHITECTURE == "x86_64" ]]; then
             GOARCH=amd64
             echo $"Using $GOARCH"