Package RmiInvocationWrapperRTD.xml in jar

Ensure RmiInvocationWrapperRTD.xml is packaged inside spring-context.jar

Issue: SPR-10649

build.gradle

@@ -11,7 +11,7 @@ buildscript {
 configure(allprojects) { project ->
 	group = "org.springframework"
 	version = qualifyVersionIfNecessary(version)
-	
+
 	// The following is a work-around until the Gradle build uses
 	// Ant 1.9.x by default. This is necessary to avoid the
 	// "Class not found: javac1.8" issue with Ant versions prior to 1.9.x
@@ -305,6 +305,9 @@ project("spring-context") {
 		testCompile("javax.inject:javax.inject-tck:1")
 	}
 
+	// pick up RmiInvocationWrapperRTD.xml in src/main
+	sourceSets.main.resources.srcDirs += "src/main/java"
+
 	test {
 		jvmArgs = ["-disableassertions:org.aspectj.weaver.UnresolvedType"] // SPR-7989
 	}