Define PRIVATE and add it to all global symbols so we don't export assembly functions.

libvpx/source/libvpx/vp8/encoder/x86/temporal_filter_apply_sse2.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.
 ;
 
 
 %include "vpx_ports/x86_abi_support.asm"
 
 ; void vp8_temporal_filter_apply_sse2 | arg
 ;  (unsigned char  *frame1,           |  0
 ;   unsigned int    stride,           |  1
 ;   unsigned char  *frame2,           |  2
 ;   unsigned int    block_size,       |  3
 ;   int             strength,         |  4
 ;   int             filter_weight,    |  5
 ;   unsigned int   *accumulator,      |  6
 ;   unsigned short *count)            |  7
-global sym(vp8_temporal_filter_apply_sse2)
+global sym(vp8_temporal_filter_apply_sse2) PRIVATE
 sym(vp8_temporal_filter_apply_sse2):
 
     push        rbp
     mov         rbp, rsp
     SHADOW_ARGS_TO_STACK 8
     SAVE_XMM
     GET_GOT     rbx
     push        rsi
     push        rdi
     ALIGN_STACK 16, rax
@@ skipping 164 matching lines @@
 SECTION_RODATA
 align 16
 _const_3w:
     times 8 dw 3
 align 16
 _const_top_bit:
     times 8 dw 1<<15
 align 16
 _const_16w
     times 8 dw 16