PR 30000: debuginfod-find should have a source-list verb
* seclines.cxx: Introduce new tool that compiles a list of source
files associated with a specified dwarf/elf file. This
compilation relies on searching the dwarf debug information,
which can be automatically retrieved via debuginfod using
libdwfl functions when required. The target file can
encompass various types, such as an executable, a coredump,
a running process, or the currently executing kernel. The
source file names are rendered as unique entries and then
displayed on the standard output.