feat(wpcarro/emacs): Support C-u, C-k KBDs in ivy

I'd like my vterm (insert), evil ex map (insert), ivy mode maps to share the
common readline KBDs.

Change-Id: I104c3328f28549cc436b02f08411f114277c851b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7384
Reviewed-by: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI

users/wpcarro/emacs/.emacs.d/wpc/keybindings.el

@@ -456,6 +456,8 @@
 ;; restore the ability to paste in ivy
 (general-define-key
  :keymaps '(ivy-minibuffer-map)
+ "C-k" #'kill-line
+ "C-u" (lambda () (interactive) (kill-line 0))
  "C-v" #'clipboard-yank
  "C-S-v" #'clipboard-yank)