Modify quantize_ssse3_x86_64.asm to trigger rebuilding

TBR=tomfinegan@chromium.org
BUG=527169

Review URL: https://codereview.chromium.org/1317753005 .
diff --git a/source/libvpx/vpx_dsp/x86/quantize_ssse3_x86_64.asm b/source/libvpx/vpx_dsp/x86/quantize_ssse3_x86_64.asm
index 3784d9d..820fbda 100644
--- a/source/libvpx/vpx_dsp/x86/quantize_ssse3_x86_64.asm
+++ b/source/libvpx/vpx_dsp/x86/quantize_ssse3_x86_64.asm
@@ -10,6 +10,7 @@
 
 %include "third_party/x86inc/x86inc.asm"
 
+
 SECTION_RODATA
 pw_1: times 8 dw 1