[vulkan] guard fuchsia-specific code

This change adds missing guards for fuchsia-specific code.

Change-Id: Idc0e0cedf956e9b2079c51dbb42811defaf2399d

include/vulkan/vulkan.hpp

diff --git a/include/vulkan/vulkan.hpp b/include/vulkan/vulkan.hpp
index e491313..0134262 100644
--- a/include/vulkan/vulkan.hpp
+++ b/include/vulkan/vulkan.hpp
@@ -34859,8 +34859,10 @@
 
   template <typename Dispatch> class UniqueHandleTraits<Buffer,Dispatch> {public: using deleter = ObjectDestroy<Device,Dispatch>; };
   using UniqueBuffer = UniqueHandle<Buffer,DispatchLoaderStatic>;
+#ifdef VK_USE_PLATFORM_FUCHSIA
   template <typename Dispatch> class UniqueHandleTraits<BufferCollectionFUCHSIA,Dispatch> {public: using deleter = ObjectDestroy<Device,Dispatch>; };
   using UniqueBufferCollectionFUCHSIA = UniqueHandle<BufferCollectionFUCHSIA,DispatchLoaderStatic>;
+#endif /*VK_USE_PLATFORM_FUCHSIA*/
   template <typename Dispatch> class UniqueHandleTraits<BufferView,Dispatch> {public: using deleter = ObjectDestroy<Device,Dispatch>; };
   using UniqueBufferView = UniqueHandle<BufferView,DispatchLoaderStatic>;
   template <typename Dispatch> class UniqueHandleTraits<CommandBuffer,Dispatch> {public: using deleter = PoolFree<Device, CommandPool,Dispatch>; };

layers/threading.h

diff --git a/layers/threading.h b/layers/threading.h
index a183fdb..572a997 100644
--- a/layers/threading.h
+++ b/layers/threading.h
@@ -285,7 +285,9 @@
     counter<VkDescriptorUpdateTemplateKHR> c_VkDescriptorUpdateTemplateKHR;
     counter<VkValidationCacheEXT> c_VkValidationCacheEXT;
     counter<VkSamplerYcbcrConversionKHR> c_VkSamplerYcbcrConversionKHR;
+#ifdef __Fuchsia__
     counter<VkBufferCollectionFUCHSIA> c_VkBufferCollectionFUCHSIA;
+#endif
     counter<VkDebugUtilsMessengerEXT> c_VkDebugUtilsMessengerEXT;
 #else   // DISTINCT_NONDISPATCHABLE_HANDLES
     counter<uint64_t> c_uint64_t;
@@ -336,7 +338,9 @@
                                           VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_UPDATE_TEMPLATE_KHR_EXT),
           c_VkSamplerYcbcrConversionKHR("VkSamplerYcbcrConversionKHR",
                                         VK_DEBUG_REPORT_OBJECT_TYPE_SAMPLER_YCBCR_CONVERSION_KHR_EXT),
+#ifdef __Fuchsia__
           c_VkBufferCollectionFUCHSIA("VkBufferCollectionFUCHSIA", VK_DEBUG_REPORT_OBJECT_TYPE_BUFFER_COLLECTION_FUCHSIA_EXT),
+#endif
           c_VkDebugUtilsMessengerEXT("VkDebugUtilsMessengerEXT", VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT)
 #else   // DISTINCT_NONDISPATCHABLE_HANDLES
           c_uint64_t("NON_DISPATCHABLE_HANDLE", VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT)
@@ -388,7 +392,9 @@
 WRAPPER(VkDescriptorUpdateTemplateKHR)
 WRAPPER(VkValidationCacheEXT)
 WRAPPER(VkSamplerYcbcrConversionKHR)
+#ifdef __Fuchsia__
 WRAPPER(VkBufferCollectionFUCHSIA)
+#endif
 WRAPPER(VkDebugUtilsMessengerEXT)
 #else   // DISTINCT_NONDISPATCHABLE_HANDLES
 WRAPPER(uint64_t)