Before we always used DW_RLE_startx_length. This is not very efficient and leads
to bigger .debug_addr section. Changed it to use
DW_RLE_base_addressx/DW_RLE_offset_pair.
clang-16 build in debug mode
llvm-bolt ran on it with --update-debug-sections
| section | before | after | diff | % decrease |
| .debug_rnglists | 32732292 | 31986051 | -746241 | 2.3% |
| .debug_addr | 14415808 | 14184128 | -231680 | 1.6% |
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D140439
e22ff52c10