fix for libghttp.diff

iscah% git diff
diff --git a/config.sub b/config.sub
index c8e7785..dd5d973 100755
--- a/config.sub
+++ b/config.sub
@@ -224,7 +224,7 @@ case $basic_machine in
              | f301-* | armv*-* | s390-* | sv1-* | t3e-* \
              | m88110-* | m680[01234]0-* | m683?2-* | m68360-* | z8k-* | d10v-* \
              | thumb-* | v850-* | d30v-* | tic30-* | c30-* | fr30-* \
-             | bs2000-*)
+             | bs2000-* | x86_64-* )
                ;;
        # Recognize the various machine names and aliases which stand
        # for a CPU type and a company and sometimes even an OS.