Add missing tests to module entry points

src/oar/main.zig

@@ -171,3 +171,7 @@ pub fn main() u8 {
 
     return 0;
 }
+
+test {
+
+}

src/ona/main.zig

@@ -23,3 +23,11 @@ pub const stack = @import("./stack.zig");
 ///
 ///
 pub const table = @import("./table.zig");
+
+test {
+    _ = io;
+    _ = mem;
+    _ = meta;
+    _ = stack;
+    _ = table;
+}