Add log4j-jul to Log4j 2 starter

Closes gh-12659

Author: wilkinsona

spring-boot-project/spring-boot-starters/spring-boot-starter-log4j2/pom.xml

@@ -23,6 +23,10 @@
 			<groupId>org.apache.logging.log4j</groupId>
 			<artifactId>log4j-core</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.apache.logging.log4j</groupId>
+			<artifactId>log4j-jul</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>jul-to-slf4j</artifactId>