Fix GCC warning in heap-profile-table.cc.

The current code throws the following warning:

../../third_party/tcmalloc/chromium/src/heap-profile-table.cc:522:42: warning:
  format '%lx' expects argument of type 'long unsigned int', but argument 4
  has type 'const void*' [-Wformat=]

BUG=None

Review URL: https://codereview.chromium.org/1180903010

Cr-Original-Commit-Position: refs/heads/master@{#334813}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 9460c33b35c889740a3dc659eb9c9d1161fd155d
1 file changed
tree: 98ad4039fd20aae883b8b5e33482ef8fe3e4e0c1
  1. src/