Do not try to build clang tests.

interpreter/CMakeLists.txt

@@ -2,6 +2,7 @@
 #---Define the way we want to build and what of llvm/clang/cling------------------------------------
 set(LLVM_ENABLE_WARNINGS OFF CACHE BOOL "")
 set(LLVM_INCLUDE_TESTS OFF CACHE BOOL "")
+set(CLANG_INCLUDE_TESTS OFF CACHE BOOL "")
 set(LLVM_INCLUDE_EXAMPLES OFF CACHE BOOL "")
 set(LLVM_BUILD_TOOLS OFF CACHE BOOL "")
 set(LLVM_FORCE_USE_OLD_TOOLCHAIN ON CACHE BOOL "")