TOMOYO: Cleanup part 4.

Gather string constants to one file in order to make the object size smaller.
Use unsigned type where appropriate.
read()/write() returns ssize_t.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

diff --cc security/tomoyo/audit.c
Simple merge

diff --cc security/tomoyo/common.c
Simple merge

diff --cc security/tomoyo/common.h
Simple merge

diff --cc security/tomoyo/domain.c
Simple merge

diff --cc security/tomoyo/file.c
Simple merge

diff --cc security/tomoyo/util.c
Simple merge