bug 15050: Add device limit for max number of input attachments

Add maxPerStageDescriptorInputAttachments and
maxDescriptorSetInputAttachments.

https://cvs.khronos.org/bugzilla/show_bug.cgi?id=15050
diff --git a/include/vulkan/vulkan.h b/include/vulkan/vulkan.h
index 4f8d477..ffead44 100644
--- a/include/vulkan/vulkan.h
+++ b/include/vulkan/vulkan.h
@@ -1203,6 +1203,7 @@
     uint32_t                                    maxPerStageDescriptorStorageBuffers;
     uint32_t                                    maxPerStageDescriptorSampledImages;
     uint32_t                                    maxPerStageDescriptorStorageImages;
+    uint32_t                                    maxPerStageDescriptorInputAttachments;
     uint32_t                                    maxDescriptorSetSamplers;
     uint32_t                                    maxDescriptorSetUniformBuffers;
     uint32_t                                    maxDescriptorSetUniformBuffersDynamic;
@@ -1210,6 +1211,7 @@
     uint32_t                                    maxDescriptorSetStorageBuffersDynamic;
     uint32_t                                    maxDescriptorSetSampledImages;
     uint32_t                                    maxDescriptorSetStorageImages;
+    uint32_t                                    maxDescriptorSetInputAttachments;
     uint32_t                                    maxVertexInputAttributes;
     uint32_t                                    maxVertexInputBindings;
     uint32_t                                    maxVertexInputAttributeOffset;