[jdk17u-dev] RFR: 8333477: Delete extra empty spaces in Makefiles

[SendaoYan]

Hi all,
  This is clean backport to delete several extra  trailing whitespaces and extra trailing lines in several Makefiles. It's trivial fix, no risk.
  The commit being backported was authored by SendaoYan on 7 Jun 2024 and was reviewed by Erik Joelsson, Christian Hagedorn, Chen Liang and Julian Waters.

Thanks.

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Commit messages:
 - Backport d130d2f4f46d37a2b924343de19d012c129b0a55

Changes: https://git.openjdk.org/jdk17u-dev/pull/2555/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2555&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333477
  Stats: 11 lines in 5 files changed: 0 ins; 2 del; 9 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2555.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2555/head:pull/2555

PR: https://git.openjdk.org/jdk17u-dev/pull/2555