Fix compile error with Windows clang.

This change fixes the following errors shown during compile with
Windows clang:

error: cannot pass non-trivial object of type 'ATL::CComBSTR' to variadic function; expected type from format string was 'wchar_t *' [-Wnon-pod-varargs]

Original CL: https://codereview.chromium.org/1252913009/

BUG=https://code.google.com/p/google-breakpad/issues/detail?id=662

Review URL: https://codereview.chromium.org/1307463003

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1494 4c0a9323-5329-0410-9bdc-e9ce6186880e
1 file changed