8373987: [lworld] exploded-image/test broken since disable patching (JDK-8373806)

[david-beaumont]

Preview mode support for exploded build.

This is an alternate approach from #1845 which I think is actually cleaner and more robust.

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Progress

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• Commit message must refer to an issue
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Issue

• JDK-8373987: [lworld] exploded-image/test broken since disable patching (JDK-8373806) (Bug - P3)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/valhalla.git pull/1854/head:pull/1854
$ git checkout pull/1854

Update a local copy of the PR:
$ git checkout pull/1854
$ git pull https://git.openjdk.org/valhalla.git pull/1854/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1854

View PR using the GUI difftool:
$ git pr show -t 1854

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/valhalla/pull/1854.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

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[openjdk]

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See the Progress checklist in the description for automated requirements.

[mlbridge]

Webrevs

• 00: Full (153604cc)