runtime: move startupRandomData back to runtime2.go

In libgo it's referenced from os_gccgo.go on all platforms.

Fixes https://gcc.gnu.org/PR98496

Change-Id: Ic5e40f4f764bc74f961c2ae1c35701c01b8ad4e0
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/280999
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Peter Weinberger <pjw@google.com>
2 files changed