Upgrade to AspectJ 1.9 RC1

Issue: SPR-16077

build.gradle

@@ -41,7 +41,7 @@ configure(allprojects) { project ->
 	group = "org.springframework"
 	version = qualifyVersionIfNecessary(version)
 
-	ext.aspectjVersion       = "1.8.11"
+	ext.aspectjVersion       = "1.8.12"
 	ext.freemarkerVersion    = "2.3.26-incubating"
 	ext.groovyVersion        = "2.4.12"
 	ext.hsqldbVersion        = "2.4.0"

spring-aspects/spring-aspects.gradle

@@ -87,8 +87,8 @@ compileTestJava  {
 
 dependencies {
 	aspects(project(":spring-orm"))
-	ajc("org.aspectj:aspectjtools:1.9.0.BETA-7")  // for JDK 9 build compatibility
-	rt("org.aspectj:aspectjrt:1.9.0.BETA-7")  // for JDK 9 build compatibility
+	ajc("org.aspectj:aspectjtools:1.9.0.RC1")  // for JDK 9 build compatibility
+	rt("org.aspectj:aspectjrt:1.9.0.RC1")  // for JDK 9 build compatibility
 	compile("org.aspectj:aspectjweaver:${aspectjVersion}")  // for Maven POM exposure
 	optional(project(":spring-aop"))  // for @Async support
 	optional(project(":spring-beans"))  // for @Configurable support