git: openjdk/jmh-jdk-microbenchmarks: update .gitignore (#4)

[duke]

Changeset: 38bfda17
Author:    Xin Wang <xin.victorwang at gmail.com>
Committer: GitHub <noreply at github.com>
Date:      2021-02-02 23:57:14 +0000
URL:       https://git.openjdk.java.net/jmh-jdk-microbenchmarks/commit/38bfda17

update .gitignore (#4)


! .gitignore