CONAKRY, Guinea — French President Francois Hollande brought a message of hope to Guinea on Friday, where thousands of residents lined the roads while clapping, drumming and dancing to catch a glimpse of the first Western leader to visit a country hard hit by Ebola. The very fact that hope exists, said Hollande, who during his roughly eight-hour visit was to tour an Ebola treatment center at the capital’s main hospital and meet with French health workers. At a meeting attended by Guinean President Alpha Conde, Hollande heard updates from aid groups. Ebola survivors have been driven from their villages and fired from their jobs as they carry a huge social stigma. Ebola has ravaged three West African countries — Guinea, Liberia and Sierra Leone — and sickened nearly 16,000 people, making it by far the largest Ebola outbreak in history.