pprof: TestHttpInsecure timeout on the openbsd-amd64 builder

Full log: https://storage.googleapis.com/go-build-log/198cc863/openbsd-amd64-62_382c8558.log

Interesting part:

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Local symbolization failed for cppbench_server_main: stat cppbench_server_main: no such file or directory
Local symbolization failed for libpthread-2.15.so: stat /libpthread-2.15.so: no such file or directory
Some binary filenames not available. Symbolization may be incomplete.
Try setting PPROF_BINARY_PATH to the search path for local binaries.
Local symbolization failed for cppbench_server_main: stat cppbench_server_main: no such file or directory
Local symbolization failed for libpthread-2.15.so: stat /libpthread-2.15.so: no such file or directory
Some binary filenames not available. Symbolization may be incomplete.
Try setting PPROF_BINARY_PATH to the search path for local binaries.
Local symbolization failed for cppbench_server_main: stat cppbench_server_main: no such file or directory
Local symbolization failed for libpthread-2.15.so: stat /libpthread-2.15.so: no such file or directory
Some binary filenames not available. Symbolization may be incomplete.
Try setting PPROF_BINARY_PATH to the search path for local binaries.
--- FAIL: TestHttpsInsecure (15.03s)
	proftest.go:114: https+insecure://127.0.0.1:28700/debug/pprof/profile: http fetch: Get https://127.0.0.1:28700/debug/pprof/profile?seconds=10: net/http: timeout awaiting response headers
	fetch_test.go:426: failed to fetch any source profiles
FAIL
FAIL	cmd/vendor/github.com/google/pprof/internal/driver	17.284s

This is with the vendored version in the Go tree, which is 0e0e5b7254e076a62326ab7305ba49e8515f0c91.

Also, the tests are very noisy. Is this intended? You can see that the rest of the standard library tests are all quiet by default, as they should be. Perhaps these logs should be hidden behind testing.Verbose().