RFR: 8315087: G1: Use uint for G1 flags indicating percentage

Mon Aug 28 11:03:42 UTC 2023

Simple type change (to `uint`) for consistency regarding percentage related flags.

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Commit messages:
 - g1-percent

Changes: https://git.openjdk.org/jdk/pull/15444/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15444&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315087
  Stats: 19 lines in 3 files changed: 0 ins; 0 del; 19 mod
  Patch: https://git.openjdk.org/jdk/pull/15444.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15444/head:pull/15444

PR: https://git.openjdk.org/jdk/pull/15444