1. Don't swap byte order in scanf. It isn't necessary and leads to

1. Don't swap byte order in scanf. It isn't necessary and leads to
   incorrect results (canonicalization was dropped several commits ago).
2. Add support for fscanf.
3. Suppress a warning about cast to pointer from non-pointer-sized integer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36482 91177308-0d34-0410-b5e6-96231b3b80d8