Description

When running the hwasan_symbolize script with the --index flag, the script does not properly differentiate between stripped and unstripped ELF files that share the same build ID. If the script encounters and indexes a stripped ELF first, it will ignore the unstripped ELF (which contains debugging symbols) when that file appears later in the directory traversal. As a result, crash stacks are only partially symbolicated.

Repro Steps

1. Run hwasan_symbolize with the --index flag on a directory containing both stripped and unstripped ELF files.
2. Observe that the script will sometime select the stripped ELF for symbolication, ignoring the unstripped ELF.

Expected Behavior

hwasan_symbolize should use the unstripped ELF for symbolication even if a stripped ELF with the same build ID appears first in the directory traversal. Stripped ELFs should be ignored as they do not contain any information useful to the symbolizer.