[wasm] Rename wasm::LocalType to wasm::ValueType and kAst* to kWasm*

test/inspector/debugger/wasm-source.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --expose-wasm
 
 load('test/mjsunit/wasm/wasm-constants.js');
 load('test/mjsunit/wasm/wasm-module-builder.js');
 
 var builder = new WasmModuleBuilder();
 
 var imported_idx = builder.addImport("xxx", "func", kSig_v_v);
 
 var call_imported_idx = builder.addFunction("call_func", kSig_v_v)
     .addBody([kExprCallFunction, imported_idx])
     .index;
 
 var sig_index = builder.addType(kSig_v_v);
 
 builder.addFunction('main', kSig_v_v)
     .addBody([
-      kExprBlock, kAstStmt, kExprI32Const, 0, kExprCallIndirect, sig_index,
+      kExprBlock, kWasmStmt, kExprI32Const, 0, kExprCallIndirect, sig_index,
       kTableZero, kExprEnd
     ])
     .exportAs('main');
 
 builder.appendToTable([call_imported_idx]);
 
 var module_bytes = builder.toArray();
 
 function testFunction(bytes) {
   function call_debugger() {
@@ skipping 37 matching lines @@
         .getScriptSource({scriptId: frames[frameId].location.scriptId})
         .then(dumpSourceLine.bind(null, frameId))
         .then(() => next(frameId + 1));
   }
   function finished() {
     InspectorTest.log('Finished.');
     InspectorTest.completeTest();
   }
   next(0).then(finished);
 }