RFR: 8352481: Extra a.out generated after configure with clang [v2]

[SendaoYan]

> Hi all,
> 
> There is an extra a.out file generated located in repository root directory after execute the configure command with llvm/clang compiler sometimes, not always. The a.out was generate by `$LINKER -Wl,-v 2>&1 | $HEAD -n 1`, shows as below. This PR  add a command to remove the extra a.out file. No risk.
> 
> 
>> rm -rf a.out ; date ; ~/software/acc/x86_64/bin/clang -Wl,-v 2>&1 | head -n 1 ; stat a.out ; ls -lh a.out ; file a.out
> Thu Mar 20 02:46:13 PM CST 2025
> GNU ld (GNU Binutils) 2.43.50.20240909
>   File: a.out
>   Size: 792 Blocks: 8 IO Block: 4096 regular file
> Device: 10303h/66307d Inode: 2355308 Links: 1
> Access: (0640/-rw-r-----) Uid: ( 995/yansendao) Gid: ( 992/yansendao)
> Access: 2025-03-20 14:46:13.682967228 +0800
> Modify: 2025-03-20 14:46:13.682967228 +0800
> Change: 2025-03-20 14:46:13.682967228 +0800
>  Birth: 2025-03-20 14:46:13.674966977 +0800
> -rw-r----- 1 yansendao yansendao 792 Mar 20 14:46 a.out
> a.out: data

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

  Add a comment line

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24125/files
  - new: https://git.openjdk.org/jdk/pull/24125/files/9931cf85..5f92746d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24125&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24125&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24125.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24125/head:pull/24125

PR: https://git.openjdk.org/jdk/pull/24125