RFR: 8335150: Test LogGeneratedClassesTest.java fails on rpmbuild mock enviroment

[SendaoYan]

Hi all,
Test `test/jdk/java/lang/invoke/lambda/LogGeneratedClassesTest.java` fails on rpm build mock environment. The `df -h` command return fail `df: cannot read table of mounted file systems: No such file or directory` on the rpm build mock environment also. I think it's a environmental issue, and the environmental issue should not cause the test fails, it should skip the test.

Only change the testcase, the change has been verified locally, no risk.

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Commit messages:
 - 8335150: Test LogGeneratedClassesTest.java fails on rpmbuild mock enviroment

Changes: https://git.openjdk.org/jdk/pull/19905/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19905&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8335150
  Stats: 23 lines in 1 file changed: 15 ins; 3 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/19905.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19905/head:pull/19905

PR: https://git.openjdk.org/jdk/pull/19905