Target/XCore/CMakeLists.txt: Add XCoreTargetTransformInfo.cpp.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190937 91177308-0d34-0410-b5e6-96231b3b80d8
A couple of tests, in llvm/test/Transforms/*/xcore, are XCore-specific. They should be excluded when XCore is not built.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190938 91177308-0d34-0410-b5e6-96231b3b80d8