[PDB] Test variadic function type in PDB

This adds back the test case reverted in commit: d260a269200824c5c1c8c6de531fd5aa63db9c35


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@344809 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed