support compressed debug_line
https://blogs.oracle.com/solaris/elf_section_compression-v2 https://gnu.wildebeest.org/blog/mjw/2016/01/13/elf-libelf-compressed-sections-and-elfutils/
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64328 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
support compressed debug_line
https://blogs.oracle.com/solaris/elf_section_compression-v2
https://gnu.wildebeest.org/blog/mjw/2016/01/13/elf-libelf-compressed-sections-and-elfutils/
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64328 b2dd03c8-39d4-4d8f-98ff-823fe69b080e