KUALA LUMPUR, Malaysia — Malaysian Prime Minister Najib Razak on Saturday announced cash aid and a raft of measures to bolster the economic status of ethnic Malay majority, deepening a decades-old controversial affirmative action program. Connect With Us on Twitter Follow @nytimesworld for international breaking news and headlines. Twitter List: Reporters and Editors Some opposition politicians call it a ploy by Najib to cement his leadership ahead of next month’s elections in his United Malays National Organization, the linchpin of the ruling coalition. Najib has come under pressure after a poor showing in May general elections, where his ruling coalition…