Generate DWARF Version 4 debuginfo

configname: CONFIG_DEBUG_INFO_DWARF4

DWARF version
└─>Generate DWARF Version 4 debuginfo
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Generate DWARF v4 debug info. This requires gcc 4.5+ and gdb 7.0+.

If you have consumers of DWARF debug info that are not ready for
newer revisions of DWARF, you may wish to choose this or have your
config select this.