cmd/go: TestScript/get_update_all changes mtimes in GOROOT/bin #37573
Description
2020-02-28T20:15:38-964fac3/linux-amd64-longtest
test_race_install_cgo was converted to a script test in CL 214426. The old test was not run in parallel, and asserted that go test -race -i runtime/race did not reinstall cmd/cgo.
I suspect that this flake was caused by some other test somehow overwriting cmd/cgo when it should not have.