go: runtime: TestNeedmDeadlock failures

#!watchflakes
post <- pkg == "runtime" && test == "TestNeedmDeadlock"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestNeedmDeadlock (5.11s)
    testenv.go:459: [/data/golang/workdir/tmp/go-build4218498514/testprogcgo.exe NeedmDeadlock] exit status: exit status 1
    crash_cgo_test.go:714: want OK
        , got Hung for 5 seconds

— watchflakes