Fix missing file

src/targets/gpu/include/migraphx/gpu/device/layernorm.hpp

+
+#ifndef MIGRAPHX_GUARD_RTGLIB_DEVICE_LAYERNORM_HPP
+#define MIGRAPHX_GUARD_RTGLIB_DEVICE_LAYERNORM_HPP
+
+#include <migraphx/argument.hpp>
+#include <migraphx/config.hpp>
+#include <hip/hip_runtime_api.h>
+
+namespace migraphx {
+inline namespace MIGRAPHX_INLINE_NS {
+namespace gpu {
+namespace device {
+
+void layernorm(hipStream_t stream, const argument& result, const argument& arg1);
+
+void triadd_layernorm(hipStream_t stream,
+                      const argument& result,
+                      const argument& arg1,
+                      const argument& arg2,
+                      const argument& arg3);
+
+} // namespace device
+} // namespace gpu
+} // namespace MIGRAPHX_INLINE_NS
+} // namespace migraphx
+
+#endif