Fix spelling error and remove the part about CMake having experimental Ninja support since 2.8.9 has been released some time ago.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172177 91177308-0d34-0410-b5e6-96231b3b80d8
Revert the line ending mess I made.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172179 91177308-0d34-0410-b5e6-96231b3b80d8
Fix spelling error and remove the part about CMake having experimental Ninja support since 2.8.9 has been released some time ago.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172182 91177308-0d34-0410-b5e6-96231b3b80d8