Add Java autobuilder integration tests

java/ql/integration-tests/all-platforms/java/ant-sample/build.xml

@@ -0,0 +1,38 @@
+<project name="ant-sample" default="dist" basedir=".">
+  <description>
+    simple example build file
+  </description>
+  <!-- set global properties for this build -->
+  <property name="src" location="src"/>
+  <property name="build" location="build"/>
+  <property name="dist" location="dist"/>
+
+  <target name="init">
+    <!-- Create the time stamp -->
+    <tstamp/>
+    <!-- Create the build directory structure used by compile -->
+    <mkdir dir="${build}"/>
+  </target>
+
+  <target name="compile" depends="init"
+        description="compile the source">
+    <!-- Compile the Java code from ${src} into ${build} -->
+    <javac srcdir="${src}" destdir="${build}"/>
+  </target>
+
+  <target name="dist" depends="compile"
+        description="generate the distribution">
+    <!-- Create the distribution directory -->
+    <mkdir dir="${dist}/lib"/>
+
+    <!-- Put everything in ${build} into the ant-sample-${DSTAMP}.jar file -->
+    <jar jarfile="${dist}/lib/ant-sample-${DSTAMP}.jar" basedir="${build}"/>
+  </target>
+
+  <target name="clean"
+        description="clean up">
+    <!-- Delete the ${build} and ${dist} directory trees -->
+    <delete dir="${build}"/>
+    <delete dir="${dist}"/>
+  </target>
+</project>

java/ql/integration-tests/all-platforms/java/ant-sample/src/main/java/com/example/App.java

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+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package com.example;
+
+public class App {
+    public String getGreeting() {
+        return "Hello world.";
+    }
+
+    public static void main(String[] args) {
+        System.out.println(new App().getGreeting());
+    }
+}

java/ql/integration-tests/all-platforms/java/ant-sample/test.expected

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+xmlFiles
+| build.xml:0:0:0:0 | build.xml |
+#select
+| src/main/java/com/example/App.java:0:0:0:0 | App |

java/ql/integration-tests/all-platforms/java/ant-sample/test.py

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+import sys
+
+from create_database_utils import *
+
+run_codeql_database_create([], lang="java")

java/ql/integration-tests/all-platforms/java/ant-sample/test.ql

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+import java
+
+from File f
+where f.isSourceFile()
+select f
+
+query predicate xmlFiles(XmlFile x) { any() }