PSS llvm: initialize external globals to unknown memory
PSS llvm: initialize external globals to unknown memory

we do not know where these point to (until first store into them).

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

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