xeyes: add dependency on libxrender

* fails without:
  | configure:10604: error: Package requirements (xrender >= 0.4) were not met:
  | No package 'xrender' found

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
xrestop: add dependency on ncurses

* fails without it
  | xrestop.c:50:20: fatal error: curses.h: No such file or directory
  |  #include <curses.h>
  |                     ^
  | compilation terminated.

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>