[lld] [llvm] [llvm-readelf] Print a blank line before the first hex/string dump (PR #85744)

[Fangrui Song via llvm-commits]

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@@ -1,10 +1,12 @@
 # REQUIRES: x86-registered-target
 
 # RUN: llvm-mc -filetype=obj -triple x86_64 %s -o %t.o
-# RUN: llvm-readobj -x .a -x .b %t.o | FileCheck %s
+# RUN: llvm-readobj -x .a -x .b %t.o | FileCheck %s --check-prefixes=HEADER,CHECK
 # RUN: llvm-readelf -x .a -x .b %t.o | FileCheck %s
 
-# CHECK:      Hex dump of section '.a':
+# HEADER:     LoadName:
----------------
MaskRay wrote:

`llvm-readobj -x .a -x .b` prints two blank lines before the first `Hex dump of section`.
We have to test `LoadName:` to skip the first blank line (not due to hex/string dump).

https://github.com/llvm/llvm-project/pull/85744