make_f2fs: issue discard commands on mkfs

We'd better to discard whole partition for better performance.

Bug: 112868088
Test: factory reset
Change-Id: I9c0c711f2b081e4d0b4e145ab08f95b382925847
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
(cherry picked from commit e72a0b95a8bc2911947b569821476b0d29f45c1a)
1 file changed