stagefright: Fix tunnel mode ifdefs

 * Was breaking on 8660 due to previous commit.

Change-Id: Ia9f5c45552cc933db336a66b6d1214b65e810488
Merge tag 'android-4.2.2_r1' of https://android.googlesource.com/platform/frameworks/av into 1.1

Android 4.2.2 release 1