set EBX as output register

BUG=none
TEST=none
R=noahric@google.com

Review URL: https://webrtc-codereview.appspot.com/2699005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@823 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 822
+Version: 823
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 822
+#define LIBYUV_VERSION 823
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/cpu_id.cc

@@ -51,7 +51,7 @@ void CpuId(uint32 eax, uint32 ecx, uint32* cpu_info) {
     : "=D" (ebx),
 #else
     "cpuid                                     \n"
-    : "+b" (ebx),
+    : "=b" (ebx),
 #endif  //  defined( __i386__) && defined(__PIC__)
       "+a" (eax), "+c" (ecx), "=d" (edx));
   cpu_info[0] = eax;