cmd/bent: freshen cmpjob.sh and cmpcl.sh

Added optional running of localfix for better behavior on
processors than need that (e.g., arm64 Big.little), and added
more shell quoting just-in-case.

Change-Id: Ic55c0a81b2c1f2ecbae75abcb6f965a1cc862867
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/485395
Reviewed-by: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: David Chase <drchase@google.com>