[clang] [Clang] diagnosing missing Vulkan environment when using SPIR-V triple (PR #190840)

[Tony Guillot via cfe-commits]

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@@ -15,6 +15,8 @@
 
 #include "Targets.h"
 #include "clang/Basic/AddressSpaces.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/DiagnosticFrontend.h"
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to268 wrote:

That's fine, keep them then.

https://github.com/llvm/llvm-project/pull/190840