fix hotspot build failures with -D_FORTIFY_SOURCE=2 and -Wformat=1

[David Holmes - Sun Microsystems]

Matthias Klose said the following on 12/04/08 06:36:
> this is http://gcc.gnu.org/PR25509, not seen as a bug in GCC. I'll discuss a
> solution for Ubuntu with my coworkers next week.

What a dismal state of affairs. :(

David