Update to 3.4a

Changelog:
       Version 3.4 (2013-03-31)

           - I hope code to manipulate keys assigned in AlgrGr and Shift-
             AltGr positions are now fixed.  (Thanks, Paul)

           - Default value of xvkbd.textDelay is now set to 10, as it seems
             delay of 0 caused problems in some situations.

           - ISO_Left_Tab is assigned to the shifted position of the Tab
             key on the xvkbd window, so that Shift-Tab can be simulated.

           - New option -no-resize to disable resize of xvkbd window.
Updated x11/xvkbd to 3.4a