Make @device_code_sass work with non-Julia kernels. - #2247

julia> @device_code_sass CUBLAS.scal!(1, 1f0, CUDA.ones(1))
	.headerflags	@"EF_CUDA_TEXMODE_UNIFIED EF_CUDA_64BIT_ADDRESS EF_CUDA_SM86 EF_CUDA_VIRTUAL_SM(EF_CUDA_SM86)"
	.elftype	@"ET_EXEC"


//--------------------- .text._Z15scal_kernel_refI7double2dEv19cublasScalParamsRefIT_T0_E --------------------------
	.section	.text._Z15scal_kernel_refI7double2dEv19cublasScalParamsRefIT_T0_E,"ax",@progbits
	.sectioninfo	@"SHI_REGISTERS=18"
	.align	128
        .global         _Z15scal_kernel_refI7double2dEv19cublasScalParamsRefIT_T0_E
        .type           _Z15scal_kernel_refI7double2dEv19cublasScalParamsRefIT_T0_E,@function
        .size           _Z15scal_kernel_refI7double2dEv19cublasScalParamsRefIT_T0_E,(.L_x_92 - _Z15scal_kernel_refI7double2dEv19cublasScalParamsRefIT_T0_E)
        .other          _Z15scal_kernel_refI7double2dEv19cublasScalParamsRefIT_T0_E,@"STO_CUDA_ENTRY STV_DEFAULT"
_Z15scal_kernel_refI7double2dEv19cublasScalParamsRefIT_T0_E:

.text._Z15scal_kernel_refI7double2dEv19cublasScalParamsRefIT_T0_E:
...