HLSL: fix BuiltInLayer to emit semantic 'SV_RenderTargetArrayIndex' instead of 'SV_RenderTargetIndex'
HLSL: fix BuiltInLayer to emit semantic 'SV_RenderTargetArrayIndex' instead of 'SV_RenderTargetIndex'

KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross