RFR: 8349143: All make control variables need special propagation [v2]

[Magnus Ihse Bursie]

> A make variable like `JTREG="JAVA_OPTIONS=-Djava.security.debug=all;MAX_OUTPUT=1000000"` could end up losing the quotes and thus the shell will split at `;` in reinvocations of make. For the `JTREG` variable specifically, this is a regression since [JDK-8348586](https://bugs.openjdk.org/browse/JDK-8348586), that moved `JTREG` from `INIT_CONTROL_VARIABLES` to `MAKE_CONTROL_VARIABLES`, which were not properly treated.

Magnus Ihse Bursie has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:

 - Remove extra line
 - Indentation got wrong during merge
 - Merge branch 'master' into fix-control-variables
 - 8349143: All make control variables need special propagation

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Changes: https://git.openjdk.org/jdk/pull/23389/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23389&range=01
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23389.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23389/head:pull/23389

PR: https://git.openjdk.org/jdk/pull/23389