Temporarily don't compile ARM v8 NEON code

Change-Id: Idd23e749fef193ee5ddaba02dad88939c5755ad3
diff --git a/Android.mk b/Android.mk
index 337d674..11eff66 100644
--- a/Android.mk
+++ b/Android.mk
@@ -31,7 +31,8 @@
 endif
 
 # ARM v8 64-bit NEON
-LOCAL_SRC_FILES_arm64 += simd/jsimd_arm64_neon.S simd/jsimd_arm64.c
+# TODO (msarett): Figure out why this won't compile on Nexus 9.
+# LOCAL_SRC_FILES_arm64 += simd/jsimd_arm64_neon.S simd/jsimd_arm64.c
 
 # TODO (msarett): x86 and x86_64 SIMD.  Cross-compiling these assembly files
 #                 on Linux for Android is very tricky.  This will require a