[jdk11u-dev] RFR: 8280401: [sspi] gss_accept_sec_context leaves output_token uninitialized

[Goetz Lindenmaier]

I backport this for parity with 11.0.19-oracle.

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Commit messages:
 - Backport 6352c020c25f2701afb4fabee0cc7fcef2d407fb

Changes: https://git.openjdk.org/jdk11u-dev/pull/1629/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1629&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8280401
  Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1629.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1629/head:pull/1629

PR: https://git.openjdk.org/jdk11u-dev/pull/1629