[Ci-reports] fail on Qt5_5.4_Integration #30

[Qt Continuous Integration System]

qtwebengine failed to compile :(

  In file included from ../../../src/3rdparty/chromium/third_party/WebKit/Source/wtf/HashTable.cpp:21:
  In file included from ../../../src/3rdparty/chromium/third_party/WebKit/Source/wtf/HashTable.h:28:
  In file included from ../../../src/3rdparty/chromium/third_party/WebKit/Source/wtf/PartitionAlloc.h:90:
  ../../../src/3rdparty/chromium/third_party/WebKit/Source/wtf/ByteSwap.h:59:53: error: use of undeclared identifier '__builtin_bswap16'
  In file included from ../../../src/3rdparty/chromium/third_party/WebKit/Source/wtf/SizeLimits.cpp:39:
  In file included from ../../../src/3rdparty/chromium/third_party/WebKit/Source/wtf/Vector.h:28:
  In file included from ../../../src/3rdparty/chromium/third_party/WebKit/Source/wtf/PartitionAlloc.h:90:
  ../../../src/3rdparty/chromium/third_party/WebKit/Source/wtf/ByteSwap.h:59:53: error: use of undeclared identifier '__builtin_bswap16'
  make[4]: *** [invoke_ninja] Error 1
  make[3]: *** [sub-gyp_run-pro-make_first] Error 2
  make[2]: *** [sub-core-make_first] Error 2
  make[1]: *** [sub-src-make_first] Error 2
  make: *** [module-qtwebengine-make_first] Error 2

  Build log: http://testresults.qt-project.org/ci/Qt5_5.4_Integration/build_00030/macx-clang_static_OSX_10.7/log.txt.gz

  Tested changes (refs/builds/5.4_1408355080):
    http://codereview.qt-project.org/90935 [PS11] - Add qtwebengine as submodule