[CMake] Fix a missing LLVM_ENABLE_IDE from r344555

This is just one place I missed swapping CMAKE_CONFIGURATION_TYPES with LLVM_ENABLE_IDE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@344568 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed