Generational ZGC on linux PPC64le

[TheRealMDoerr]

PPC64 implementation.

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/zgc pull/1/head:pull/1
$ git checkout pull/1

Update a local copy of the PR:
$ git checkout pull/1
$ git pull https://git.openjdk.java.net/zgc pull/1/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1

View PR using the GUI difftool:
$ git pr show -t 1

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/zgc/pull/1.diff

[bridgekeeper]

👋 Welcome back mdoerr! A progress list of the required criteria for merging this PR into zgc_generational will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[TheRealMDoerr]

Already integrated.