RFR: 8272983: G1 Add marking details to eager reclaim logging

[Ivan Walulya]

Hi all,

Please review this small change to add details on marking status in both prev and next marking bitmaps to the logging output in G1PrepareRegionsClosure.

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Commit messages:
 - 8272983: G1 Add marking details to eager reclaim logging

Changes: https://git.openjdk.java.net/jdk/pull/5254/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5254&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272983
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5254.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5254/head:pull/5254

PR: https://git.openjdk.java.net/jdk/pull/5254