Add x86_64 optimized __memcmp16 implementation;
fix tabs in 32-bit implementation.

Change-Id: I7bbfb344074aed66511c1a845998dc38798116ea
Signed-off-by: Varvara Rainchik <varvara.rainchik@intel.com>
diff --git a/runtime/Android.mk b/runtime/Android.mk
index 8fc5e34..302e835 100644
--- a/runtime/Android.mk
+++ b/runtime/Android.mk
@@ -252,6 +252,7 @@
   arch/x86_64/context_x86_64.cc \
   arch/x86_64/entrypoints_init_x86_64.cc \
   arch/x86_64/jni_entrypoints_x86_64.S \
+  arch/x86_64/memcmp16_x86_64.S \
   arch/x86_64/portable_entrypoints_x86_64.S \
   arch/x86_64/quick_entrypoints_x86_64.S \
   arch/x86_64/thread_x86_64.cc \