samples: core: fix noop shader on D3D11
samples: core: fix noop shader on D3D11

galek/crown,dbartolini/crown,mikymod/crown,dbartolini/crown,dbartolini/crown,galek/crown,mikymod/crown,dbartolini/crown,galek/crown,galek/crown,mikymod/crown,mikymod/crown