[llvm] [AArch64][ELF Parser] Fix out-of-scope variable usage (PR #130576)

[via llvm-commits]

sivan-shani wrote:

This is a fix for failing sanitizers on commit:
https://github.com/llvm/llvm-project/commit/b1ebfac1859c4fd1db3620098f6af4fd98e6174d

failing sanitizers:
https://lab.llvm.org/buildbot/#/builders/51/builds/12245

https://github.com/llvm/llvm-project/pull/130576