Introduce sharing of `LambdaForms` for `VarHandle` linkers and invokers. It reduces the number of LambdaForms needed at runtime.
Testing: tier1-4 ------------- Commit messages: - Share LambdaForms for VH linkers/invokers. Changes: https://git.openjdk.java.net/jdk/pull/1455/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1455&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8257164 Stats: 48 lines in 3 files changed: 21 ins; 10 del; 17 mod Patch: https://git.openjdk.java.net/jdk/pull/1455.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/1455/head:pull/1455 PR: https://git.openjdk.java.net/jdk/pull/1455
