Remove 'byval' attribute from created safe pointers
Remove 'byval' attribute from created safe pointers

Not doing this step can result in 'byval' attribute being stuck to
structs passed by value, which is invalid.

toaarnio/llvm-ir-memprotect,toaarnio/llvm-ir-memprotect,toaarnio/llvm-ir-memprotect,toaarnio/llvm-ir-memprotect