Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/vp8/common/arm/neon/bilinearpredict8x4_neon.asm

 ;
 ;  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 ;
 ;  Use of this source code is governed by a BSD-style license
 ;  that can be found in the LICENSE file in the root of the source
 ;  tree. An additional intellectual property rights grant can be found
 ;  in the file PATENTS.  All contributing project authors may
 ;  be found in the AUTHORS file in the root of the source tree.
 ;
 
 
     EXPORT  |vp8_bilinear_predict8x4_neon|
     ARM
     REQUIRE8
     PRESERVE8
 
     AREA ||.text||, CODE, READONLY, ALIGN=2
 ; r0    unsigned char  *src_ptr,
 ; r1    int  src_pixels_per_line,
 ; r2    int  xoffset,
 ; r3    int  yoffset,
 ; r4    unsigned char *dst_ptr,
 ; stack(lr) int  dst_pitch
 
 |vp8_bilinear_predict8x4_neon| PROC
     push            {r4, lr}
 
-    ldr             r12, _bifilter8x4_coeff_
+    adr             r12, bifilter8x4_coeff
     ldr             r4, [sp, #8]            ;load parameters from stack
     ldr             lr, [sp, #12]           ;load parameters from stack
 
     cmp             r2, #0                  ;skip first_pass filter if xoffset=0
     beq             skip_firstpass_filter
 
 ;First pass: output_height lines x output_width columns (5x8)
     add             r2, r12, r2, lsl #3     ;calculate filter location
 
     vld1.u8         {q1}, [r0], r1          ;load src data
@@ skipping 83 matching lines @@
     vst1.u8         {d23}, [r4], lr
     vst1.u8         {d24}, [r4], lr
     vst1.u8         {d25}, [r4], lr
 
     pop             {r4, pc}
 
     ENDP
 
 ;-----------------
 
-_bifilter8x4_coeff_
-    DCD     bifilter8x4_coeff
 bifilter8x4_coeff
     DCD     128, 0, 112, 16, 96, 32, 80, 48, 64, 64, 48, 80, 32, 96, 16, 112
 
     END