RFR: 8368565: Adjust comment regarding dependency of libjvm.so to librt

Wed Sep 24 15:36:32 UTC 2025

We have a legacy dependency of libjvm to librt for the` clock_*` functions :
https://github.com/openjdk/jdk/blob/f993f90c86f89eb0c7f42ebecb45a68eae0bd9ea/make/autoconf/libraries.m4#L139

But this is for very old systems with distros like RHEL 6 or SLES11 with glibc 2.16 or older, where the clock_ functions were still in librt ; but those ancient distros play no role any more for current JDK26.
On the other hand, we now use the `timer_*` functions from librt e.g. in JFR and these are _really_  in librt so the comment should be adjusted.

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Commit messages:
 - JDK-8368565

Changes: https://git.openjdk.org/jdk/pull/27473/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27473&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8368565
  Stats: 5 lines in 1 file changed: 0 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/27473.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27473/head:pull/27473

PR: https://git.openjdk.org/jdk/pull/27473