Jon Turney authored Feb 04, 2014 and Hugo Beauzée-Luyssen committed Dec 20, 2017

For cygwin and mingw targets, build a dump_syms tool which can read DWARF
symbols contained in a PE/COFF executable.

I felt bad about making another copy of dump_symbols.cc, so this one has the
beginnings of being parameterized by an image file reader class, so we can apply
it to a pecoff-format image file reading class

Write pecoff format image file reading class which
- knows how to read PE32 and PE32+ image files
- makes PECOFF file id by fetching from a CV record or by hashing
- can read PECOFF exports as a fallback if there is no DWARF information

v2:
Don't include arpa/inet.h on MinGW

v3:
Use AM_CPPFLAGS for NO_STABS_SUPPORT

v4:
Fixes for -Werror=sign-compare errors arising due to signedness of size_t
Update use of Module::Extern() for change in r1415
Fix EOT fallback to match reality rather than PE/COFF spec.

v5:
Add needed include of winsock.h for htons etc.

v6:
Update for char -> uint8_t changes in commit bc44efdc

v7:
Update for "Add debug fission support" changes

What's this?  We now build elf_reader.cc into our COFF symbols dumping tool?
But why is that?  Because dwarf2reader now contains an entirely separate ELF
reader, for reading .dwo/.dwp files...