Don't use stale NDK libraries for IA

IA builds will break (due to the bionic _dso_handle bug) if stale libraries are
used. For now, just guard the defns against IA builds.

Change-Id: Ic9df6e0de78a0e221b95370ba6f01ce07714edde
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>