Update jdt.core to M5 candidate I20180124-2000 (omitting 00395bbb)
diff --git a/org.eclipse.jdt.core.tests.compiler/pom.xml b/org.eclipse.jdt.core.tests.compiler/pom.xml
index 164901c..f63bc16 100644
--- a/org.eclipse.jdt.core.tests.compiler/pom.xml
+++ b/org.eclipse.jdt.core.tests.compiler/pom.xml
@@ -43,4 +43,34 @@
   	</plugins>
   </build>
 
+  <profiles>
+	<profile>
+		<id>test-on-javase-9</id>
+		<build>
+			<plugins>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-toolchains-plugin</artifactId>
+					<version>1.1</version>
+					<executions>
+						<execution>
+							<phase>validate</phase>
+							<goals>
+								<goal>toolchain</goal>
+							</goals>
+						</execution>
+					</executions>
+					<configuration>
+						<toolchains>
+							<jdk>
+								<id>JavaSE-9</id>
+							</jdk>
+						</toolchains>
+					</configuration>
+				</plugin>
+			</plugins>
+		</build>
+	</profile>
+  </profiles>
+
 </project>