RFR: 8265343: Update Debian-based cross-compilation recipes

[Aleksey Shipilev]

After [JDK-8257913](https://bugs.openjdk.java.net/browse/JDK-8257913), we do not need to set a whole lot of options for cross-compiled builds. Docs should be updated to reflect that fact. Also put in more configurations that are buildable with Debian ports: these build routinely at [builds.shipilev.net](https://builds.shipilev.net/openjdk-jdk/).

Maybe @glaubitz wants to chime in here too :)

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Commit messages:
 - 8265343: Update Debian-based cross-compilation recipes

Changes: https://git.openjdk.java.net/jdk/pull/3545/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3545&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265343
  Stats: 132 lines in 2 files changed: 88 ins; 17 del; 27 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3545.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3545/head:pull/3545

PR: https://git.openjdk.java.net/jdk/pull/3545