[clang] [llvm] [clang][DebugInfo] Add symbol for debugger with VTable information. (PR #130255)

[via llvm-commits]

asmok-g wrote:

Heads-up: I don't know if this is expected but our (google's) debug metrics report for some targets show decreased dwarfdump coverage as follows:
`#vars_with_source_location/#total_var` dropped from 1 to 0.988 or to 9.85.

One example target is the loader target [from Tensorflow](https://github.com/tensorflow/tensorflow/blob/master/tensorflow/core/summary/BUILD).

https://github.com/llvm/llvm-project/pull/130255