Add further required LLVM components to CMakeLists.txt

[jppelteret]

Added missing LLVM components asmparser and nativecodegen

[jppelteret]

@isuruf With nativecodegen listed as a component for SymEngine directly, CMake has picked up all of the correct libraries as you'd indicated to me should happen.

$ otool -L ../install/lib/libsymengine.dylib
../install/lib/libsymengine.dylib:
	@rpath/libsymengine.0.2.dylib (compatibility version 0.2.0, current version 0.2.0)
	@rpath/libLLVMAsmParser.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMCore.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMExecutionEngine.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMInstCombine.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMMCJIT.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMScalarOpts.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMSupport.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMTransformUtils.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMX86CodeGen.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMX86AsmPrinter.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMX86AsmParser.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMX86Desc.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMX86Info.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libLLVMX86Disassembler.dylib (compatibility version 0.0.0, current version 0.0.0)
	/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 120.1.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1)

[isuruf]

Thanks