bent: add support for randomizing binaries
The -R <count> flag separately builds a different binary for
each benchmark run; the build rules can use $BENT_I to randomize
(or not).
Added two benchmarks to the suite, one of them requires rangefunc.
Updated go.mod.
Change-Id: Ia903b32fc2b7d35ab14213f92fba745331b223e2
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/563895
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
4 files changed
