lrzsz: Fix build with Jellybean 4.2

4.2 adds tcdrain(), so we can't define it here again

Change-Id: Ice561cf0fffdc4f02701531f5df41e132b4cfac8
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
1 file changed