RFR: 8319153: Fix: Class is a raw type in ProcessTools

[Leo Korinth]

Changing from `Class c` to `Class<?> c` removes two warnings.

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Commit messages:
 - 8319153: Fix: Class is a raw type in ProcessTools

Changes: https://git.openjdk.org/jdk/pull/16431/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16431&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319153
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16431.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16431/head:pull/16431

PR: https://git.openjdk.org/jdk/pull/16431