init.rc: TCP Performance tuning
restorecon_recursive("/sys") speed boot time

Currently, the restorecon_recursive("/sys") call in
init.c takes approx 2 seconds on hammerhead. This change
reduces the delay to 1.2 seconds.

1) Avoid double stat call when using nftw (time savings
of 0.3 seconds)
2) Avoid the repeated calls to is_selinux_enabled() (time
savings of 0.5 seconds)

Avoid calling lsetfilecon if the file is already properly
labeled. This doesn't speed up the restorecon on /sys,
but it should help when handling files on /data.

Change-Id: Icf344edc5bfc9520d3a0ebd9527a065d29832f87
restorecon /data/misc/media.

Otherwise it will be mislabeled on upgrades with existing userdata.

AOSP: https://android-review.googlesource.com/79022/

Signed-off-by: Humberto Borba <humberos@gmail.com>
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Change-Id: Ibde88d5d692ead45b480bb34cfe0831baeffbf94
Fix overflow in adb_client

Credit: Joshua Drake
Bug: 12060953

(cherry picked from commit e89e09dd2b9b42184973e3ade291186a2737bced)

Change-Id: I8a9b2592a5e4f7527c607abfe4ea6df6eb550aa8