Initialize X86 DataLayout based on the Triple only.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215279 91177308-0d34-0410-b5e6-96231b3b80d8
Remove extraneous 64-bit argument to the PPC TargetMachine constructor
and update initialization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215280 91177308-0d34-0410-b5e6-96231b3b80d8