Fix the Tcl binding install script -- did not install to /usr/lib64.

Signed-off-by: Tomas Janousek <tjanouse@redhat.com>
Reviewed-by: Stepan Kasal <skasal@redhat.com>
---

--- brltty-3.8/Bindings/Tcl/pkgutil.lib64	2007-06-04 15:20:32.000000000 +0200
+++ brltty-3.8/Bindings/Tcl/pkgutil	2007-08-21 15:08:46.000000000 +0200
@@ -31,7 +31,7 @@
             }
             set directory [eval file join / [lrange $components $rootCount end]]
 
-            if {[string equal [file tail $directory] lib]} {
+            if {[string equal [file tail $directory] lib] || [string equal [file tail $directory] lib64]} {
                global optionValues packageName packageVersion
                return [file join "$optionValues(root)$directory" "$packageName-$packageVersion"]
             }