RFR: 8264306: Non deterministic generation of java/lang/invoke/MemberName.class

[Jan Lahoda]

When hoisting binding variables to the outer scope, we should use `LinkedHashMap` instead of `HashMap`, so that `javac` produces reproducible classfiles.

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Commit messages:
 - 8264306: Non deterministic generation of java/lang/invoke/MemberName.class

Changes: https://git.openjdk.java.net/jdk/pull/3257/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3257&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264306
  Stats: 121 lines in 2 files changed: 119 ins; 1 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3257.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3257/head:pull/3257

PR: https://git.openjdk.java.net/jdk/pull/3257