Add support for autoconf + autoheader 2.7x.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit c23f9f6934)

cvs.sh

@@ -25,7 +25,7 @@ check_autotool_versions()
 required_autoconf_version="2.53 or newer"
 AUTOCONF_VERSION=`$AUTOCONF --version | head -n 1`
 case $AUTOCONF_VERSION in
-  Autoconf*2.5* | autoconf*2.5* | autoconf*2.6* ) : ;;
+  Autoconf*2.5* | autoconf*2.[567]* ) : ;;
   "" )
     echo "*** AUTOCONF NOT FOUND!."
     echo "*** TDE requires autoconf $required_autoconf_version"
@@ -40,7 +40,7 @@ esac
 
 AUTOHEADER_VERSION=`$AUTOHEADER --version | head -n 1`
 case $AUTOHEADER_VERSION in
-  Autoconf*2.5* | autoheader*2.5* | autoheader*2.6* ) : ;;
+  Autoconf*2.5* | autoheader*2.[567]* ) : ;;
   "" )
     echo "*** AUTOHEADER NOT FOUND!."
     echo "*** TDE requires autoheader $required_autoconf_version"