Issues with ELF d2d on Debian debug package

[pombredanne]

I run an ELF d2d with

• http://deb.debian.org/debian/pool/main/b/binutils/binutils_2.31.1.orig.tar.xz#from
• http://ftp.us.debian.org/debian/pool/main/b/binutils/libbinutils-dbg_2.31.1-16_amd64.deb#to

There are a few issues:

• to/debian-binary files SHOULD not be mapped nor matched #1215
• PurlDB: do not match the debian-binary file found in a .deb purldb#422 which leads to an incorrect purldb match ofn a random deb package in PurlDB
• Extracted to/ .deb package is not detected as a package (to/control.tar.xz-extract/control)
• to/data.tar.xz-extract/usr/lib/debug/.dwz/x86_64-linux-gnu/libbinutils.debug has some unmapped paths. We should report these are "require-review"
• Some paths not mapped may need to be skipped?
  • dwarf_included_paths_not_mapped:
    • build/binutils-lybw70/binutils-2.31.1/builddir-single/opcodes/<built-in>
  • generally things that come from the standard library are likely best skipped by default?
    • Determine if file built in an ELF comes from a C/C++ standard library
      • Files like usr/include/errno.h or usr/include/x86_64-linux-gnu/bits/setjmp.h