[CMake] Cleanup uses of USES_TERMINAL

Now that we are on CMake 3.4.3 we no longer need a version check around this.

This is the clang side of r272211.

llvm-svn: 272213

Author: Chris Bieneman

clang/runtime/CMakeLists.txt

@@ -83,7 +83,6 @@ if(LLVM_BUILD_EXTERNAL_COMPILER_RT AND EXISTS ${COMPILER_RT_SRC_ROOT}/)
                -DCOMPILER_RT_INCLUDE_TESTS=${LLVM_INCLUDE_TESTS}
                -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
                -DLLVM_LIBDIR_SUFFIX=${LLVM_LIBDIR_SUFFIX}
-               -Dcmake_3_2_USES_TERMINAL=${cmake_3_2_USES_TERMINAL}
                ${COMPILER_RT_PASSTHROUGH_VARIABLES}
     INSTALL_COMMAND ""
     STEP_TARGETS configure build
@@ -136,7 +135,7 @@ if(LLVM_BUILD_EXTERNAL_COMPILER_RT AND EXISTS ${COMPILER_RT_SRC_ROOT}/)
         DEPENDS compiler-rt-build ${COMPILER_RT_TEST_DEPENDENCIES}
         WORKING_DIRECTORY ${BINARY_DIR}
         VERBATIM
-        ${cmake_3_2_USES_TERMINAL}
+        USES_TERMINAL
         )
     endforeach()