[jdk11u-dev] RFR: 8279958: Provide configure hints for Alpine/apk package managers

[Aleksei Voitylov]

JDK-8279958 is a follow up issue of a chain of backports for Alpine support to 11u, adding configure hints for Alpine.

Original changeset does not apply cleanly because of:

8219920: dependency help output in configure-step : support zypper tool
8257679: Improved unix compatibility layer in Windows build (winenv)

Testing: configure produced expected output, GHA.

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Commit messages:
 - JDK-8279958 backport to 11u

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/969/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=969&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279958
  Stats: 25 lines in 1 file changed: 23 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/969.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/969/head:pull/969

PR: https://git.openjdk.java.net/jdk11u-dev/pull/969