Bump gosteno [#74982504]

5c1406e Better error message when syslog setup fails
5eb8c6e fix config initialization
eb26b3d make thread-safe

Signed-off-by: John Tuley <jtuley@pivotallabs.com>
automatic promotion by GoCD workflow LoggregatorIntegrationTest/35 > IntegrationTests/1 > IntegrationTests

tests passed against https://github.com/cloudfoundry/cf-release/commit/38a3e0882dbd10987f772526ba3d6f6369b6da6c