os: TestKillFindProcess failures with "Test process succeeded, but expected to fail" #44131
Description
--- FAIL: TestKillFindProcess (1.78s)
os_test.go:2199: Test process succeeded, but expected to fail
FAIL
FAIL os 5.004s
2020-08-17T20:06:49-e6d0bd2/darwin-amd64-nocgo
2019-11-02T21:51:23-7955ece/aix-ppc64
2019-11-01T16:05:22-8d45e61/aix-ppc64
2019-09-01T10:08:53-99df76f/solaris-amd64-oraclerel
See previously #43722.