[jdk8u-dev] RFR: 8343334: JFR crash in JfrEmergencyDump::build_dump_path

[lingjun-cg]

Expect a string value but actually pass an integer value to `jio_snprintf` which could lead to undefined behavior.
The minor result is the error JFR file path, the major result is JVM crash.

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Commit messages:
 - 8343334: JFR crash in JfrEmergencyDump::build_dump_path

Changes: https://git.openjdk.org/jdk8u-dev/pull/599/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=599&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8343334
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/599.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/599/head:pull/599

PR: https://git.openjdk.org/jdk8u-dev/pull/599