[coverage] Enable sanitizer coverage.

tools/sanitizers/sanitize_pcs.py

Index: tools/sanitizers/sanitize_pcs.py
diff --git a/tools/sanitizers/sanitize_pcs.py b/tools/sanitizers/sanitize_pcs.py
new file mode 100755
index 0000000000000000000000000000000000000000..47f27150962dff245a07bfb8b780adef2bffb678
--- /dev/null
+++ b/tools/sanitizers/sanitize_pcs.py
@@ -0,0 +1,11 @@
+#!/usr/bin/env python
+# 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.
+
+"""Corrects objdump output. The logic is from sancov.py, see comments there."""
+
+import sys;
+
+for line in sys.stdin:
+  print '0x%x' % (int(line.strip(), 16) + 4)