ABUJA — Nigeria’s president has pardoned the late activist Ken Saro-Wiwa, 30 years after his execution sparked global outrage.Along with eight other campaigners, Saro-Wiwa was convicted of murder,ABUJA — Nigeria’s president has pardoned the late activist Ken Saro-Wiwa, 30 years after his execution sparked global outrage.Along with eight other campaigners, Saro-Wiwa was convicted of murder,