[llvm] Allow the dumping of .dwo files contents to show up when dumping an e… (PR #66726)

[David Blaikie via llvm-commits]

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+## Check that llvm-dwarfdump works when dumping .o files with .dwo files.
+
+# RUN: yaml2obj %p/Inputs/dump_dwo.o.yaml -o %T/dump_dwo.o
+# RUN: yaml2obj %p/Inputs/dump_dwo.dwo.yaml -o %T/dump_dwo.dwo
+## We need to be in the same directory so we can find .dwo file
+# RUN: cd %T && llvm-dwarfdump --dwo %T/dump_dwo.o | FileCheck %s
+# RUN: cd %T && llvm-dwarfdump --name int --name char %T/dump_dwo.o | FileCheck %s --check-prefix=NAMES
+# RUN: cd %T && llvm-dwarfdump --lookup 0x10 %T/dump_dwo.o | FileCheck %s --check-prefix=LOOKUP
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dwblaikie wrote:

Each run line doesn't need its own `cd` - can use one up-front. (maybe even before the `yaml2obj` lines, then those lines don't need to `%T/dump_dwo.o` they can write to `dump_dwo.o`, etc, unqualified.

https://github.com/llvm/llvm-project/pull/66726