RFR: 8294456: Fix misleading-indentation warnings in core JDK libraries [v3]

[Raffaello Giulietti]

> This fixes misleading indentations, which allows enabling the (currently disabled) `misleading-indentation` warning flag on two `.gmk` files.

Raffaello Giulietti has updated the pull request incrementally with one additional commit since the last revision:

  8294456: Fix misleading-indentation warnings in JDK

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10487/files
  - new: https://git.openjdk.org/jdk/pull/10487/files/4581b7dd..7b455e5a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10487&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10487&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10487.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10487/head:pull/10487

PR: https://git.openjdk.org/jdk/pull/10487