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

source/libvpx/vp8/common/arm/armv6/copymem16x16_v6.asm

Index: source/libvpx/vp8/common/arm/armv6/copymem16x16_v6.asm
===================================================================
--- source/libvpx/vp8/common/arm/armv6/copymem16x16_v6.asm	(revision 96967)
+++ source/libvpx/vp8/common/arm/armv6/copymem16x16_v6.asm	(working copy)
@@ -22,9 +22,7 @@
     ;push   {r4-r7}
 
     ;preload
-    pld     [r0]
-    pld     [r0, r1]
-    pld     [r0, r1, lsl #1]
+    pld     [r0, #31]                ; preload for next 16x16 block
 
     ands    r4, r0, #15
     beq     copy_mem16x16_fast
@@ -90,6 +88,8 @@
     ldrneb  r6, [r0, #2]
     ldrneb  r7, [r0, #3]
 
+    pld     [r0, #31]               ; preload for next 16x16 block
+
     bne     copy_mem16x16_1_loop
 
     ldmia       sp!, {r4 - r7}
@@ -121,6 +121,8 @@
     ldrne   r6, [r0, #8]
     ldrne   r7, [r0, #12]
 
+    pld     [r0, #31]               ; preload for next 16x16 block
+
     bne     copy_mem16x16_4_loop
 
     ldmia       sp!, {r4 - r7}
@@ -148,6 +150,7 @@
 
     add     r2, r2, r3
 
+    pld     [r0, #31]               ; preload for next 16x16 block
     bne     copy_mem16x16_8_loop
 
     ldmia       sp!, {r4 - r7}
@@ -171,6 +174,7 @@
     ;stm        r2, {r4-r7}
     add     r2, r2, r3
 
+    pld     [r0, #31]               ; preload for next 16x16 block
     bne     copy_mem16x16_fast_loop
 
     ldmia       sp!, {r4 - r7}