* addr2line.c: Include ELF header after system headers (especially
  sys/types.h) to avoid compilation failure,
  "usr/include/sh3/elf_machdep.h:4:2: error: #error Define _BYTE_ORDER!",
  on NetBSD/sh3 (dreamcast, hpcsh, landisk, mmeye).



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43426 b2dd03c8-39d4-4d8f-98ff-823fe69b080e