[libunwind] [libunwind][test] change to use llvm-objdump (PR #156383)

[Wu Yingcong via cfe-commits]

https://github.com/yingcong-wu created https://github.com/llvm/llvm-project/pull/156383

In https://github.com/llvm/llvm-project/pull/154902, the test failed with llvm-clang-win-x-aarch64(it pretends to be a Linux build?), and objdump is not available there. 
Change the test to use llvm-objdump instead of objdump, it should be available in this case.

>From b69df27e57cc0b0673960bc6802693df9fcc1e03 Mon Sep 17 00:00:00 2001
From: "Wu, Yingcong" <yingcong.wu at intel.com>
Date: Tue, 2 Sep 2025 09:42:07 +0800
Subject: [PATCH] switch to llvm-objdump

---
 libunwind/test/eh_frame_fde_pc_range.pass.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libunwind/test/eh_frame_fde_pc_range.pass.cpp b/libunwind/test/eh_frame_fde_pc_range.pass.cpp
index d8bcb3939913c..28f4ae1efed31 100644
--- a/libunwind/test/eh_frame_fde_pc_range.pass.cpp
+++ b/libunwind/test/eh_frame_fde_pc_range.pass.cpp
@@ -19,9 +19,9 @@
 // XFAIL: msan
 
 // RUN: %{build}
-// RUN: objcopy --dump-section .eh_frame_hdr=%t_ehf_hdr.bin %t.exe
+// RUN: llvm-objcopy --dump-section .eh_frame_hdr=%t_ehf_hdr.bin %t.exe
 // RUN: echo -ne '\xFF' | dd of=%t_ehf_hdr.bin bs=1 seek=2 count=2 conv=notrunc status=none 
-// RUN: objcopy --update-section .eh_frame_hdr=%t_ehf_hdr.bin %t.exe
+// RUN: llvm-objcopy --update-section .eh_frame_hdr=%t_ehf_hdr.bin %t.exe
 // RUN: %{exec} %t.exe
 
 // clang-format on