Update travis with mvnw permission

gnuhpc · gnuhpc · commit 04bcf1ae3d95 · 2018-07-15T20:54:14.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,7 @@
 language: java
 jdk: oraclejdk8
+install:
+  - mvn -N io.takari:maven:wrapper
+  - ./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V
 before_install:
   - chmod +x mvnw
