test: Run dtoc tests

Update the test script to run the dtoc tests also.

Signed-off-by: Simon Glass <sjg@chromium.org>

test/run

@@ -21,6 +21,7 @@ PYTHONPATH=build-sandbox_spl/scripts/dtc/pylibfdt run_test \
 	./tools/binman/binman -t
 run_test ./tools/patman/patman --test
 run_test ./tools/buildman/buildman -t
+PYTHONPATH=build-sandbox_spl/scripts/dtc/pylibfdt run_test ./tools/dtoc/dtoc -t
 
 if [ $result == 0 ]; then
 	echo "Tests passed!"