Testing a direct "gradle build" (no gradlew)

.travis.yml

@@ -1,3 +1,17 @@
+# Copyright 2018 The Nomulus Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 language: java
 install: true
 jdk:
@@ -26,6 +40,6 @@ install:
 
 # Specialize gradle build to use an up-to-date gradle and the /gradle
 # directory.
-# The "travis_wait 30" lets our build spend up to 30 minutes without writing
+# The "travis_wait 45" lets our build spend up to 45 minutes without writing
 # output, instead of the default 10.
-script: cd gradle && ../gradle-4.10.2/bin/gradle wrapper && travis_wait 45 ./gradlew build
+script: cd gradle && travis_wait 45 ../gradle-4.10.2/bin/gradle build