fixed typo in new_from_triple and added args to new_from_name
fixed typo in new_from_triple and added args to new_from_name

new_from_triple: need to pass subtarget info to new_from_target

new_from_name: allow caller to pass cpu and feature info

llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy