[llvm] [llvm-objcopy][COFF] Support --rename-section (PR #210573)

[James Henderson via llvm-commits]

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+## Long section names (>8 bytes) go into the COFF string table.
+
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-objcopy --rename-section=.text=.longsectionname %t %t2
+# RUN: llvm-readobj --sections --symbols --string-table %t2 | FileCheck %s
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jh7370 wrote:

What is the purpose of dumping the symbols for this test case?

https://github.com/llvm/llvm-project/pull/210573