[llvm] [DWARFLinker] Update `stmt-seq-macho.test` to use `update_test_body.py` (PR #133363)

[Fangrui Song via llvm-commits]

================
@@ -73,11 +70,1836 @@ EOF
   stmt_seq_macho.cpp \
   -o stmt_seq_macho.o
 
-"$TOOLCHAIN/ld64.lld" \
+# Link into an executable
+ld64.lld \
   -arch arm64 \
   -platform_version macos 11.0.0 11.0.0 \
   -o stmt_seq_macho.exe \
   stmt_seq_macho.o \
   -dead_strip \
   --icf=all \
+  -oso_prefix $(pwd)/ \
   --keep-icf-stabs
+
+# Convert executable to YAML for the test
+echo "#--- stmt_seq_macho.o.yaml"
----------------
MaskRay wrote:

`echo '#--- a.s'` looks good. `lld/test/ELF/debug-names-type-units.s` has an example

```
#--- gen
echo '#--- a.tu.s'
clang --target=x86_64-linux -S -O1 -g -gpubnames -fdebug-types-section a.cc -o -
echo '#--- a.foreign-tu.s'
clang --target=x86_64-linux -S -O1 -g -gpubnames -fdebug-types-section -gsplit-dwarf a.cc -o -
echo '#--- b.s'
clang --target=x86_64-linux -S -O1 -g -gpubnames b.cc -o -
.endif
```
(probably should use -fdebug-compilation-dir=. on non-linux systems)

https://github.com/llvm/llvm-project/pull/133363