[wasm] Enforce that function bodies end with the \"end\" opcode.

test/inspector/debugger/wasm-scripts-expected.txt

Index: test/inspector/debugger/wasm-scripts-expected.txt
diff --git a/test/inspector/debugger/wasm-scripts-expected.txt b/test/inspector/debugger/wasm-scripts-expected.txt
index 2bce71e7bf401226878dd47eeabe9bff7f60d896..284cc055712bacc58f34f610b336a244dcc80238 100644
--- a/test/inspector/debugger/wasm-scripts-expected.txt
+++ b/test/inspector/debugger/wasm-scripts-expected.txt
@@ -1,16 +1,18 @@
 Check that inspector gets two wasm scripts at module creation time.
 Script #0 parsed. URL: v8://test/testFunction
 Script #1 parsed. URL: v8://test/runTestRunction
-Script #2 parsed. URL: wasm://wasm/wasm-911a065e/wasm-911a065e-0
-Script #3 parsed. URL: wasm://wasm/wasm-911a065e/wasm-911a065e-1
-Source for wasm://wasm/wasm-911a065e/wasm-911a065e-0:
+Script #2 parsed. URL: wasm://wasm/wasm-e783515e/wasm-e783515e-0
+Script #3 parsed. URL: wasm://wasm/wasm-e783515e/wasm-e783515e-1
+Source for wasm://wasm/wasm-e783515e/wasm-e783515e-0:
 func $nopFunction
-nop
+  nop
+end
 
-Source for wasm://wasm/wasm-911a065e/wasm-911a065e-1:
+Source for wasm://wasm/wasm-e783515e/wasm-e783515e-1:
 func $main
-block
-  i32.const 2
-  drop
+  block
+    i32.const 2
+    drop
+  end
 end