llvm-slicer: don't dump whole functions in pointer annotations
llvm-slicer: don't dump whole functions in pointer annotations

When dumping pointers to functions, use only the name of function

Signed-off-by: Marek Chalupa <a05df156a69ad59faa9af9b666ef78009594c145@gmail.com>

mchalupa/dg,mchalupa/dg,mchalupa/dg,mchalupa/dg