Enable ARC in the static FMDB target

fmdb.xcodeproj/project.pbxproj

@@ -1331,6 +1331,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_ENABLE_OBJC_WEAK = YES;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				COMBINE_HIDPI_IMAGES = YES;
@@ -1348,6 +1349,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_ENABLE_OBJC_WEAK = YES;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				COMBINE_HIDPI_IMAGES = YES;