Remove AssemblyAnnotationWriter from NamedMDNode::print.

No functionality change, this parameter was always set to nullptr.

Patch by Robert Matusewicz!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206972 91177308-0d34-0410-b5e6-96231b3b80d8
Fix handling of missing DataLayout in sanitizers.

Pass::doInitialization is supposed to return False when it did not
change the program, not when a fatal error occurs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206975 91177308-0d34-0410-b5e6-96231b3b80d8