[llvm-debuginfo-analyzer] Add support for DW_AT_GNU_template_name.

Address reviewer feedback.
- Change the comment to add clarity to the patch.

Author: CarlosAlbertoEnciso

llvm/test/tools/llvm-debuginfo-analyzer/DWARF/DW_AT_GNU_template_name.test

@@ -21,7 +21,7 @@
 ; 17
 ; 18 Example TT;
 
-; The llvm-debuginfo-analyzer does not support the DW_AT_GNU_template_name
+; The llvm-debuginfo-analyzer did not support the DW_AT_GNU_template_name
 ; attribute. When using '--attribute=encoded' and the template argument is
 ; another template, it will show:
 ;   {Encoded} <>