UPSTREAM: android: binder: Check for errors in binder_alloc_shrinker_init().

Both list_lru_init() and register_shrinker() might return an error.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Sherry Yang <sherryy@android.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 533dfb250d1c8d2bb8c9b65252f7b296b29913d4)

Change-Id: I5325ccaf34a04179ef3dae73dd8f3abfd6e21565