[llvm] [llvm][Dwarf] Add DW_AT_language_name/DW_AT_language_version codes (PR #162446)

[Adrian Prantl via llvm-commits]

================
@@ -424,6 +424,9 @@ HANDLE_DW_AT(0x89, export_symbols, 5, DWARF)
 HANDLE_DW_AT(0x8a, deleted, 5, DWARF)
 HANDLE_DW_AT(0x8b, defaulted, 5, DWARF)
 HANDLE_DW_AT(0x8c, loclists_base, 5, DWARF)
+// New in Dwarf v6:
+HANDLE_DW_AT(0x90, language_name, 6, DWARF)
+HANDLE_DW_AT(0x91, language_version, 6, DWARF)
----------------
adrian-prantl wrote:

Where are these numbers from?

https://dwarfstd.org/issues/210419.1.html
```
DW_AT_language_name 0x8d    constant
DW_AT_language_version  0x8e    constant
```

https://github.com/llvm/llvm-project/pull/162446