runtime: add debugging to TestTimePprof
We've seen timeouts of TestTimePprof, but the tracebacks aren't useful
because goroutines are running on other threads. Add GOTRACEBACK=crash
to catch these in the future.
For #41120.
Change-Id: I97318172ef78d0cbab10df5e4ffcbfeadff579e3
Reviewed-on: https://go-review.googlesource.com/c/go/+/258802
Trust: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>