fix fmov build error on gcc 4.7 for neon64

TBR=kjellander@chromium.org
BUG=libyuv:732
TEST=LibYUVPlanarTest.TestScaleSumSamples_Opt

Change-Id: If80e9510ad5668b080b9384e656c0bd73cf5b4a6
Reviewed-on: https://chromium-review.googlesource.com/663764
Commit-Queue: Frank Barchard <fbarchard@google.com>
Reviewed-by: Frank Barchard <fbarchard@google.com>
Reviewed-by: Cheng Wang <wangcheng@google.com>

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1668
+Version: 1669
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1668
+#define LIBYUV_VERSION 1669
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_

source/row_neon64.cc

@@ -2711,8 +2711,7 @@ float ScaleSumSamples_NEON(const float* src,
       "b.gt       1b                             \n"
       "faddp      v5.4s, v5.4s, v6.4s            \n"
       "faddp      v5.4s, v5.4s, v5.4s            \n"
-      "faddp      v5.4s, v5.4s, v5.4s            \n"
-      "fmov       %w3, s5                        \n"  // sum
+      "faddp      %3.4s, v5.4s, v5.4s            \n"  // sum
 
       : "+r"(src),    // %0
         "+r"(dst),    // %1