round OS X targetOS property off

The complete value for OS X is ["osx", "darwin", "bsd4", "bsd", "unix"]

Change-Id: Ib0f08e1dfb4ef2ce6e23eeffbfa054fe01b629cf
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Jake Petroules <jake.petroules@petroules.com>
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>

src/plugins/qbsprojectmanager/defaultpropertyprovider.cpp

@@ -96,7 +96,8 @@ QVariantMap DefaultPropertyProvider::properties(const ProjectExplorer::Kit *k, c
                                    : QStringList() << QLatin1String("msvc"));
         } else if (targetAbi.os() == ProjectExplorer::Abi::MacOS) {
             data.insert(QLatin1String(QBS_TARGETOS), QStringList() << QLatin1String("osx")
-                        << QLatin1String("darwin") << QLatin1String("unix"));
+                        << QLatin1String("darwin") << QLatin1String("bsd4")
+                        << QLatin1String("bsd") << QLatin1String("unix"));
             if (tc->type() != QLatin1String("clang")) {
                 data.insert(QLatin1String(QBS_TOOLCHAIN), QLatin1String("gcc"));
             } else {