Add a method to set up /proc/cpuinfo with enough privileges. Set
up the environment for an app in InitializeNativeBridge().
Turn on -Wall for libnativebridge.
(cherry picked from commit 962eb40abb)
(cherry picked from commit ab0da5a9a6)
(cherry picked from commit 2f71cb24fa)
(cherry picked from commit 04054e28e2)
(cherry picked from commit 4390a63236)
Bug: 17671501
Change-Id: Id4f4127d82737b5e56a77175e1068ff5cea60f9d
Do not allow arbitrary paths for the native bridge - only allow
simple names.
Do not allow re-setup of the native bridge.
Bug: 16404669
Change-Id: Ie22de356d2307fe2758f9094a85d44e61a4098a1
