Fix Bug #47337:

innochecksum not built for --with-plugin-innodb_plugin --without-plugin-innobase

In 5.1, we can have the traditional "innobase" code
(built-in) or the new version "innodb" (plugin).
The help tool "innochecksum" is useful for both,
but its generation was coupled to "innobase" only.

Fix this by treating both "innobase" and "innodb"
equivalent in the configure phase,
this affects both "innochecksum" and the InnoDB documentation.

This patch was proposed by Mark Callaghan.

configure.in

@@ -2711,7 +2711,7 @@ then
     MAN_DROP="$MAN_DROP embedded"
     grep -v 'embedded' $MANLISTFIL > $TMPLISTFIL ; mv -f $TMPLISTFIL $MANLISTFIL
   fi
-  if test X"$with_plugin_innobase" != Xyes
+  if test X"$with_plugin_innobase" != Xyes -a X"$with_plugin_innodb_plugin" != Xyes
   then
     MAN_DROP="$MAN_DROP innodb"
     grep -v 'inno' $MANLISTFIL > $TMPLISTFIL ; mv -f $TMPLISTFIL $MANLISTFIL
@@ -2790,7 +2790,7 @@ then
 fi
 
 # "innochecksum" is not in the "innobase/" subdirectory, but should be switched
-AM_CONDITIONAL([BUILD_INNODB_TOOLS], [test X"$with_plugin_innobase" = Xyes])
+AM_CONDITIONAL([BUILD_INNODB_TOOLS], [test X"$with_plugin_innobase" = Xyes -o X"$with_plugin_innodb_plugin" = Xyes ])
 
 # IMPORTANT - do not modify LIBS past this line - this hack is the only way
 # I know to add the static NSS magic if we have static NSS libraries with