Call Platform::SetHostPlatform in the NetBSD platform only on NetBSD

[krytarowski]

Summary

This should push forward integration of the NetBSD code with others.

This commit aims to address regression with LLDB tests (http://reviews.llvm.org/D14844).

[clayborg]

Looks fine.

[krytarowski]

Thank you, please land http://reviews.llvm.org/D14530 again.

source/Plugins/Platform/NetBSD/PlatformNetBSD.cpp

 
 void
 PlatformNetBSD::Initialize ()
 {
     Platform::Initialize ();
 
     if (g_initialize_count++ == 0)
     {
+#if defined(__NetBSD__)
         // Force a host flag to true for the default platform object.
         PlatformSP default_platform_sp (new PlatformNetBSD(true));
         default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture());
         Platform::SetHostPlatform (default_platform_sp);
+#endif
         PluginManager::RegisterPlugin(PlatformNetBSD::GetPluginNameStatic(false),
                                       PlatformNetBSD::GetDescriptionStatic(false),
                                       PlatformNetBSD::CreateInstance);
     }
 }
 
 void
 PlatformNetBSD::Terminate ()