Copy subprogram from original function

This allows DWARF debug info to be emitted for functions.

Author: pcc

llvm/lib/Transforms/Instrumentation/FilPizlonator.cpp

@@ -10056,6 +10056,7 @@ class Pizlonator {
           GlobalValue::InternalLinkage, F->getAddressSpace(),
           "pizlonatedFI_" + F->getName(), &M);
         FunctionToHiddenFunction[F] = NewF;
+        NewF->setSubprogram(F->getSubprogram());
 
         PutImplIntoComdat(F, NewF);