[wasm] Use GetWasmCalleeTag for RUNTIME_ENTRY relocation

R=mstarzinger@chromium.org

Change-Id: I77356a84a89ff94dc5516e3507e11d0b5c429107
Reviewed-on: https://chromium-review.googlesource.com/951927
Reviewed-by: Eric Holk <eholk@chromium.org>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#51778}

src/wasm/wasm-serialization.cc

@@ -588,10 +588,9 @@ bool NativeModuleDeserializer::ReadCode() {
         break;
       }
       case RelocInfo::RUNTIME_ENTRY: {
-        uint32_t orig_target = static_cast<uint32_t>(
-            reinterpret_cast<intptr_t>(iter.rinfo()->target_address()));
+        uint32_t tag = GetWasmCalleeTag(iter.rinfo());
         Address address =
-            ExternalReferenceTable::instance(isolate_)->address(orig_target);
+            ExternalReferenceTable::instance(isolate_)->address(tag);
         iter.rinfo()->set_target_runtime_entry(address, SKIP_WRITE_BARRIER,
                                                SKIP_ICACHE_FLUSH);
         break;