After mdempsky's recent changes, these are the only references to
"TheChar" left in the Go tree. Without the context, and without
knowing the history, this is confusing.
Also rename sys.TheGoos and sys.TheGoarch to sys.GOOS
Also change the heap dump format to include sys.GOARCH
rather than TheChar, which is no longer a concept.
Updates #15169 (changes heapdump format)
Reviewed-by: Matthew Dempsky <firstname.lastname@example.org>
Bumping to 1.10. Most likely we're going to rip out the heap dump format and replace it with @randall77's core dump reader, at which point this will become obsolete, but that's not going to happen until 1.10.