RFR: 8339235: Fix indentation in build system

[Magnus Ihse Bursie]

The indentation in the build system should be two spaces for logical indents, and four spaces for broken lines, period.

I searched for files starting with an odd number of spaces, and fixed those.

-------------

Commit messages:
 - Merge branch 'master' into fix-bad-indentation
 - 8339235: Fix indentation in build system

Changes: https://git.openjdk.org/jdk/pull/20763/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20763&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339235
  Stats: 122 lines in 25 files changed: 12 ins; 1 del; 109 mod
  Patch: https://git.openjdk.org/jdk/pull/20763.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20763/head:pull/20763

PR: https://git.openjdk.org/jdk/pull/20763