Rename wast to wat

tests/compiler/class-extends.optimized.wat

@@ -0,0 +1,26 @@
+(module
+ (type $iv (func (param i32)))
+ (memory $0 1)
+ (export "test" (func $class-extends/test))
+ (export "memory" (memory $0))
+ (func $class-extends/test (; 0 ;) (type $iv) (param $0 i32)
+  (drop
+   (i32.load
+    (get_local $0)
+   )
+  )
+  (drop
+   (i32.load16_s offset=4
+    (get_local $0)
+   )
+  )
+  (i32.store
+   (get_local $0)
+   (i32.const 2)
+  )
+  (i32.store16 offset=4
+   (get_local $0)
+   (i32.const 3)
+  )
+ )
+)