[CMake] Fixing a typo in a CMake option

CMake defines are set with -D, forgetting the D doesn’t work.

llvm-svn: 271937

Author: Chris Bieneman

clang/runtime/CMakeLists.txt

@@ -82,7 +82,7 @@ if(LLVM_BUILD_EXTERNAL_COMPILER_RT AND EXISTS ${COMPILER_RT_SRC_ROOT}/)
                -DCOMPILER_RT_INSTALL_PATH:STRING=lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}
                -DCOMPILER_RT_INCLUDE_TESTS=${LLVM_INCLUDE_TESTS}
                -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
-               -LLVM_LIBDIR_SUFFIX=${LLVM_LIBDIR_SUFFIX}
+               -DLLVM_LIBDIR_SUFFIX=${LLVM_LIBDIR_SUFFIX}
                -Dcmake_3_2_USES_TERMINAL=${cmake_3_2_USES_TERMINAL}
                ${COMPILER_RT_PASSTHROUGH_VARIABLES}
     INSTALL_COMMAND ""