Fix Memcheck:Overlap in setting up rect bench names

Change-Id: Ie34da42198971606222d1cffe5bf6171a5ce4846
Reviewed-on: https://skia-review.googlesource.com/9093
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed