[llvm] Update Called Globals info when updating Call Site info (PR #122762)

[Eli Friedman via llvm-commits]

https://github.com/efriedma-quic approved this pull request.

LGTM

On a related note, should we skip constructing the CalledGlobalsMap if we know nothing will actually consume the information?

https://github.com/llvm/llvm-project/pull/122762