random: always use /dev/urandom

/dev/random on Android cannot even properly generate a UUID;
it's practically unusable.

There are no programs/applications on Android that should use /dev/random.

Also see this paper: "Security Analysis of Pseudo-Random Number Generators
with Input: /dev/random is not Robust"

http://eprint.iacr.org/2013/338.pdf



Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: Alex Naidis <alex.naidis@linux.com>
Signed-off-by: MOVZX <movzx@yahoo.com>