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Adding this allows dsymutil to parse a DebugMap from the Mach-O file, which allows it to then create an appropriate .dSYM package for the dylib if desired. TEST=vm/dart/unobfuscated_static_symbols_test Cq-Include-Trybots: luci.dart.try:vm-aot-mac-release-arm64-try,vm-aot-linux-release-simarm_x64-try Bug: https://github.com/dart-lang/sdk/issues/60307 Change-Id: I723fde90b73d74e06840418c693858f5729cea58 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/434381 Reviewed-by: Slava Egorov <vegorov@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Tess Strickland <sstrickl@google.com>