add libyuv/scale_neon64.cc

from r1051, missed in r1060 snapshot update

Change-Id: I3756d8d29fc0dd4c4491efa84b8f8837edde23a7

examples.mk

diff --git a/examples.mk b/examples.mk
index 91bd45a..537d8ff 100644
--- a/examples.mk
+++ b/examples.mk
@@ -31,6 +31,7 @@
                 third_party/libyuv/source/scale_common.cc \
                 third_party/libyuv/source/scale_mips.cc \
                 third_party/libyuv/source/scale_neon.cc \
+                third_party/libyuv/source/scale_neon64.cc \
                 third_party/libyuv/source/scale_posix.cc \
                 third_party/libyuv/source/scale_win.cc \