libvpx: Pull from upstream

source/libvpx/vp9/common/x86/vp9_postproc_mmx.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.
 ;
 
@@ skipping 446 matching lines @@
     pop         rbp
     ret
 %undef flimit2
 
 
 ;void vp9_plane_add_noise_mmx (unsigned char *start, unsigned char *noise,
 ;                            unsigned char blackclamp[16],
 ;                            unsigned char whiteclamp[16],
 ;                            unsigned char bothclamp[16],
 ;                            unsigned int width, unsigned int height, int pitch)
-extern sym(rand)
 global sym(vp9_plane_add_noise_mmx) PRIVATE
 sym(vp9_plane_add_noise_mmx):
     push        rbp
     mov         rbp, rsp
     SHADOW_ARGS_TO_STACK 8
     GET_GOT     rbx
     push        rsi
     push        rdi
     ; end prolog
 
 .addnoise_loop:
-    call sym(rand) WRT_PLT
+    call sym(LIBVPX_RAND) WRT_PLT
     mov     rcx, arg(1) ;noise
     and     rax, 0xff
     add     rcx, rax
 
     ; we rely on the fact that the clamping vectors are stored contiguously
     ; in black/white/both order. Note that we have to reload this here because
     ; rdx could be trashed by rand()
     mov     rdx, arg(2) ; blackclamp
 
 
@@ skipping 35 matching lines @@
 SECTION_RODATA
 align 16
 Blur:
     times 16 dw 16
     times  8 dw 64
     times 16 dw 16
     times  8 dw  0
 
 rd:
     times 4 dw 0x40