Disable CR/LF translation for adb interactive shell.

adb shell uses termios to disable canonical input processing in order to
get raw control codes but it does not disable CR/LF translation. The default
for Linux terminals is to convert CR to LF unless the running program
specifically asks for this to be disabled. Since adb does not, there is no
way to send a CR to any program run on adb shell. Many programs do in fact
differentiate and so are broken by this behaviour, notably nano. This patch
sets the termios flags to disable all line ending translation.

Change-Id: I8b950220f7cc52fefaed2ee37d97e0789b40a078
Signed-off-by: Alistair Buxton <a.j.buxton@gmail.com>