RFR: 8253050: jfr disassemble command processes --max-chunks incorrectly

[Ekaterina Vergizova]

The problem is caused by Disassemble.combineChunkSizes() implementation that checks maxChunks after incrementation of
fileSize, therefore the first output file has extra chunk.

Testing:
jdk/jdk/jfr/*

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Commit messages:
 - 8253050: jfr disassemble command processes --max-chunks incorrectly

Changes: https://git.openjdk.java.net/jdk/pull/205/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=205&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253050
  Stats: 21 lines in 2 files changed: 13 ins; 6 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/205.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/205/head:pull/205

PR: https://git.openjdk.java.net/jdk/pull/205