simde-diagnostic: Include simde-arch
When checking for the SIMDE_DIAGNOSTIC_DISABLE_VECTOR_CONVERSION_
simde-arch.h was getting included after simde-diagnostic.h
This caused SIMDE_ARCH_ARM to not be defined during the check.
#include "hedley.h"
#include "simde-detect-clang.h"
+#include "simde-arch.h"
/* This is only to help us implement functions like _mm_undefined_ps. */
#if defined(SIMDE_DIAGNOSTIC_DISABLE_UNINITIALIZED_)
