Apply patch readline62-001.

From http://ftp.gnu.org/gnu/readline/readline-6.2-patches/readline62-001:

                           READLINE PATCH REPORT
                           =====================

Readline-Release: 6.2
Patch-ID: readline62-001

Bug-Reported-by:        Clark J. Wang <dearvoid@gmail.com>
Bug-Reference-ID:       <AANLkTimGbW7aC4E5infXP6ku5WPci4t=xVc+L1SyHqrD@mail.gmail.com>
Bug-Reference-URL:      http://lists.gnu.org/archive/html/bug-bash/2011-02/msg00157.html

Bug-Description:

The readline vi-mode `cc', `dd', and `yy' commands failed to modify the
entire line.

[This patch intentionally does not modify patchlevel]

Patch (apply with `patch -p0'):

*** ../readline-6.2-patched/vi_mode.c   2010-11-20 19:51:39.000000000 -0500
--- vi_mode.c   2011-02-17 20:24:25.000000000 -0500
***************
*** 1115,1119 ****
        _rl_vi_last_motion = c;
        RL_UNSETSTATE (RL_STATE_VIMOTION);
!       return (0);
      }
  #if defined (READLINE_CALLBACKS)
--- 1115,1119 ----
        _rl_vi_last_motion = c;
        RL_UNSETSTATE (RL_STATE_VIMOTION);
!       return (vidomove_dispatch (m));
      }
  #if defined (READLINE_CALLBACKS)
*** ../readline-6.2-patched/callback.c  2010-06-06 12:18:58.000000000 -0400
--- callback.c  2011-02-17 20:43:28.000000000 -0500
***************
*** 149,152 ****
--- 149,155 ----
          /* Should handle everything, including cleanup, numeric arguments,
             and turning off RL_STATE_VIMOTION */
+         if (RL_ISSTATE (RL_STATE_NUMERICARG) == 0)
+           _rl_internal_char_cleanup ();
+
          return;
        }