RFR: JDK-8292778: EncodingSupport_md.c convertUtf8ToPlatformString wrong placing of free

[Matthias Baesken]

There seems to be a case where EncodingSupport_md.c convertUtf8ToPlatformString might leak memory because of a wrong placing of free..

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Commit messages:
 - JDK-8292778

Changes: https://git.openjdk.org/jdk/pull/9981/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9981&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292778
  Stats: 3 lines in 1 file changed: 1 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9981.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9981/head:pull/9981

PR: https://git.openjdk.org/jdk/pull/9981