Simplify build-script: LLVM_LIT_ARGS is already being added to cmake_options.

Author: adrian-prantl

utils/build-script-impl

@@ -2527,8 +2527,8 @@ for host in "${ALL_HOSTS[@]}"; do
 
                             if [[ "${ENABLE_ASAN}" ]] ; then
                                 # Limit the number of parallel tests.
-                                cmake_options+=(
-                                    -DLLVM_LIT_ARGS="--threads=$(sysctl hw.physicalcpu | cut -d : -f 2)"
+                                LLVM_LIT_ARGS+=(
+                                    "--threads=$(sysctl hw.physicalcpu | cut -d : -f 2)"
                                 )
                             fi
                         fi