RFR: 8341585: Test java/foreign/TestUpcallStress.java should mark as /native

[SendaoYan]

Hi all,
The newly added test `java/foreign/TestUpcallStress.java` call `System.loadLibrary("TestUpcall")` load native library, so this test should mark as `/native`.
The change has been verified locally, trivial fix, no risk.

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Commit messages:
 - 8341585: Test java/foreign/TestUpcallStress.java should mark as /native

Changes: https://git.openjdk.org/jdk/pull/21374/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21374&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341585
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21374.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21374/head:pull/21374

PR: https://git.openjdk.org/jdk/pull/21374