RFR: 8349921: Crash in codeBuffer.cpp:1004: guarantee(sect->end() <= tend) failed: sanity

[Andrew Dinn]

The compiler blob base size needs increasing in case the JDK is built without ZGC. The increment when ZGC is used can be comparably decreased. The final blob size increment when ZGC is included is over generous and can also be decreased.

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Commit messages:
 - Ensure final and compiler stub sizes correctly allow for ZGC

Changes: https://git.openjdk.org/jdk/pull/23776/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23776&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349921
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/23776.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23776/head:pull/23776

PR: https://git.openjdk.org/jdk/pull/23776