layers: provide correct spirv environment

spirv-tools now supports the Vulkan 1.1 environment qualifier. This
updates PreCallValidateCreateShaderModule() to send the appropriate
spirv environment version based on the Vulkan API version.

Change-Id: Iad897ca8da7a50d45f588d227299e91c76f36f19
diff --git a/layers/shader_validation.cpp b/layers/shader_validation.cpp
index 0b6495c..68c2129 100644
--- a/layers/shader_validation.cpp
+++ b/layers/shader_validation.cpp
@@ -1714,7 +1714,11 @@
         }
 
         // Use SPIRV-Tools validator to try and catch any issues with the module itself
-        spv_context ctx = spvContextCreate(SPV_ENV_VULKAN_1_0);
+        spv_target_env spirv_environment = SPV_ENV_VULKAN_1_0;
+        if (GetApiVersion(dev_data) >= VK_API_VERSION_1_1) {
+            spirv_environment = SPV_ENV_VULKAN_1_1;
+        }
+        spv_context ctx = spvContextCreate(spirv_environment);
         spv_const_binary_t binary{pCreateInfo->pCode, pCreateInfo->codeSize / sizeof(uint32_t)};
         spv_diagnostic diag = nullptr;