[wasm] Fix pc output for wasm compiled frames

This fixed the {WasmCompiledFrame::Print} method to print the pc offset
(an integer) in hexadecimal notation, and not print it as a pointer
value, which somehow produced weird output in my case.

R=mstarzinger@chromium.org

Change-Id: I417e980d2bf1448f5694a32c28a7c7bca1de9703
Reviewed-on: https://chromium-review.googlesource.com/1122866Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54155}

src/frames.cc

@@ -1774,7 +1774,7 @@ void WasmCompiledFrame::Print(StringStream* accumulator, PrintMode mode,
   int func_name_len = std::min(kMaxPrintedFunctionName, raw_func_name.length());
   memcpy(func_name, raw_func_name.start(), func_name_len);
   func_name[func_name_len] = '\0';
-  accumulator->Add("], function #%u ('%s'), pc=%p, pos=%d\n",
+  accumulator->Add("], function #%u ('%s'), pc=+0x%x, pos=%d\n",
                    this->function_index(), func_name, pc, this->position());
   if (mode != OVERVIEW) accumulator->Add("\n");
 }