binder: Don't include the compat symbols on arm64 binaries

... Since they're not the same when built at 64-bit, and the likelihood
of blobs requiring this are slim to none, just remove them

Change-Id: Ib4207055a9aadeb589a92b97a000f94cae270aa3
Merge branch 'cm-12.0' of git://github.com/CyanogenMod/android_frameworks_native into cm-12.0