[test] Add tests for return_call(_indirect) in try

This adds tests of `return_call(_indirect)`s within `try`s. Because this
repo's interpreter doesn't have the tail call support, this requires
 #274 to be merged before merging. But currently even with #??? the
tests here don't run. When a `return_call(_indirect)` run within a
`try`, it errors out with
```
runtime crash: undefined frame
```
I think we need to fix the interpreter first before merging this.

Closes #249.

Author: aheejin

test/core/try_catch.wast

@@ -147,6 +147,26 @@
       (catch $e0 (i32.const 1))
     )
   )
+
+  (func $throw-void (throw $e0))
+  (func (export "return-call-in-try-catch")
+    (try
+      (do
+        (return_call $throw-void)
+      )
+      (catch $e0)
+    )
+  )
+
+  (table funcref (elem $throw-void))
+  (func (export "return-call-indirect-in-try-catch")
+    (try
+      (do
+        (return_call_indirect (param) (i32.const 0))
+      )
+      (catch $e0)
+    )
+  )
 )
 
 (assert_return (invoke "empty-catch"))
@@ -188,6 +208,9 @@
 (assert_return (invoke "catchless-try" (i32.const 0)) (i32.const 0))
 (assert_return (invoke "catchless-try" (i32.const 1)) (i32.const 1))
 
+(assert_exception (invoke "return-call-in-try-catch"))
+(assert_exception (invoke "return-call-indirect-in-try-catch"))
+
 (module
   (func $imported-throw (import "test" "throw"))
   (tag $e0)

test/core/try_delegate.wast

@@ -115,6 +115,36 @@
                          (delegate $l3))))
           unreachable)
       (catch_all (i32.const 1))))
+
+  (func $throw-void (throw $e0))
+  (func (export "return-call-in-try-delegate")
+    (try $l
+      (do
+        (try
+          (do
+            (return_call $throw-void)
+          )
+          (delegate $l)
+        )
+      )
+      (catch $e0)
+    )
+  )
+
+  (table funcref (elem $throw-void))
+  (func (export "return-call-indirect-in-try-delegate")
+    (try $l
+      (do
+        (try
+          (do
+            (return_call_indirect (param) (i32.const 0))
+          )
+          (delegate $l)
+        )
+      )
+      (catch $e0)
+    )
+  )
 )
 
 (assert_return (invoke "delegate-no-throw") (i32.const 1))
@@ -140,6 +170,9 @@
 
 (assert_return (invoke "delegate-correct-targets") (i32.const 1))
 
+(assert_exception (invoke "return-call-in-try-delegate"))
+(assert_exception (invoke "return-call-indirect-in-try-delegate"))
+
 (assert_malformed
   (module quote "(module (func (delegate 0)))")
   "unexpected token"