ROOT: add LLVM_BUILD_TYPE=Debug for debugging

projects/CMakeLists.txt

@@ -82,6 +82,7 @@ if(ROOT_native_version)
       ENVIRONMENT MYSQL_HOME=${mysql_home}
       CMAKE_ARGS -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
                  -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+                 -DLLVM_BUILD_TYPE=Debug
                  IF ROOT_version VERSION_EQUAL 99 OR ROOT_version VERSION_GREATER_EQUAL 6.20 THEN
                     -Droot7=ON
                  ELSE