Add gcc

Author: tjake

build.yaml

@@ -7,6 +7,9 @@ java:
   - oraclejdk8
 build:
   - script: |
+      export DEBIAN_FRONTEND=noninteractive
       export MAVEN_HOME=/home/jenkins/.mvn/apache-maven-3.2.5
       export PATH=$MAVEN_HOME/bin:$PATH
+      sudo apt-get update
+      sudo apt-get install -y build-essential
       mvn -B install -DskipTests