ncurses have already provided clear,so rename it to clear.mesa-demos.
[ RB - check that clear exists before moving ]
(From OE-Core rev: a9c174fd4bfabbae00d947738b06e72d7809eab3)
Signed-off-by: Li Xin <lixin.fnst@cn.fujitsu.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>