This change improves how LLDB's ProcessElfCore plugin identifies the
main executable when loading ELF core files. Previously, the code would
simply use the first entry in the NT_FILE section, which is not
guaranteed to be the main executable, also the first entry might not
have a valid UUID.
1. **Storing executable name**: Extract the executable name from the ELF
NT_PRPSINFO note and store it in `m_executable_name`
2. **Preferential matching**: When selecting the main executable from
NT_FILE entries, prefer entries whose path ends with the stored
executable name
3. **UUID-based lookup**: Call `FindModuleUUID()` helper function to
properly match modules by path and retrieve a valid UUID
Co-authored-by: George Hu <hyubo@meta.com>
c087da4b18