Bug 1448627 - Update cubeb to 7712aaab. r=jya

MozReview-Commit-ID: HbYayQvtQQc

--HG--
extra : rebase_source : b214c693b7f1c7914d39dfd363d85db7eebb0e6c

media/libcubeb/README_MOZILLA

@@ -5,4 +5,4 @@ Makefile.in build files for the Mozilla build system.
 
 The cubeb git repository is: git://github.com/kinetiknz/cubeb.git
 
-The git commit ID used was 77cb1a9a37bb9fcc43743770727cb6a31b27ab74 (2018-03-23 14:38:34 +1000)
+The git commit ID used was 7712aaabfa140e8c7fe890e3f5f65dfe3fe58632 (2018-03-25 11:30:38 +0200)

media/libcubeb/src/cubeb_mixer.cpp

@@ -14,9 +14,6 @@
 #include <climits>
 #include <cmath>
 #include <cstdlib>
-#ifdef _MSC_VER
-#include <intrin.h>
-#endif
 #include <memory>
 #include <type_traits>
 #include "cubeb-internal.h"
@@ -80,8 +77,6 @@ unsigned int cubeb_channel_layout_nb_channels(cubeb_channel_layout x)
 {
 #if __GNUC__ || __clang__
   return __builtin_popcount (x);
-#elif _MSC_VER
-  return __popcnt(x);
 #else
   x -= (x >> 1) & 0x55555555;
   x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
@@ -90,6 +85,7 @@ unsigned int cubeb_channel_layout_nb_channels(cubeb_channel_layout x)
   return (x + (x >> 16)) & 0x3F;
 #endif
 }
+
 struct MixerContext {
   MixerContext(cubeb_sample_format f,
                uint32_t in_channels,