RFR: 8333477: Delete extra empty spaces in Makefiles

[Chen Liang]

On Tue, 4 Jun 2024 07:47:46 GMT, SendaoYan <syan at openjdk.org> wrote:

> Hi all,
>   This PR several extra empty spaces and extra empty lines in several Makefiles. It's trivial fix, no risk.
> 
> Thanks.

Changes requested by liach (Author).

test/jdk/java/rmi/reliability/benchmark/bench/rmi/Makefile line 1:

> 1: #

This file change is dubious:
1. It does not have any trailing whitespace that can fail the skara checks.
2. If the duplicate blank lines in the end of this Makefile is indeed problematic (as fixed here), please fix the only other occasion in the JDK, which is the Makefile in the parent directory. (Checked with `\n$^\n$\Z` pattern in all Makefiles)

Recommended actions: Either
1. Revert changes in this file;
2. Also update `test/jdk/java/rmi/reliability/benchmark/bench/Makefile` to remove the trailing blank line.

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PR Review: https://git.openjdk.org/jdk/pull/19537#pullrequestreview-2102735910
PR Review Comment: https://git.openjdk.org/jdk/pull/19537#discussion_r1629981196