[mlir][mlir-translation] patch for standalone-translation command line description...

[mlir][mlir-translation] patch for standalone-translation command line description missing.

Differential Revision: https://reviews.llvm.org/D134696

	modified:   mlir/examples/standalone/standalone-translate/standalone-translate.cpp
	modified:   mlir/include/mlir/Tools/mlir-translate/Translation.h
	modified:   mlir/lib/Target/Cpp/TranslateRegistration.cpp
	modified:   mlir/lib/Target/LLVMIR/ConvertFromLLVMIR.cpp
	modified:   mlir/lib/Target/LLVMIR/ConvertToLLVMIR.cpp
	modified:   mlir/lib/Target/SPIRV/TranslateRegistration.cpp
	modified:   mlir/lib/Tools/mlir-translate/Translation.cpp