runtime: avoid fma in mkfastlog2table
runtime: avoid fma in mkfastlog2table

This lets us generate identical copies of fastlog2table.go on all hosts.

Tested by regenerating fastlog2table.go on linux-amd64 and darwin-arm64.

Fixes #49891

Change-Id: I279d6b5abb5a5290c049d9658050fd9c8d0c0190
Reviewed-on: https://go-review.googlesource.com/c/go/+/413976
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@google.com>
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@google.com>
Reviewed-by: Michael Knyszek <4473450dc5c88f06e1fb787f303d7805ec2aee65@google.com>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Auto-Submit: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@google.com>

nawawi/go,golang/go,nawawi/go,golang/go,golang/go,golang/go,nawawi/go,golang/go,golang/go,nawawi/go,nawawi/go,nawawi/go,nawawi/go,golang/go,nawawi/go,golang/go