Added max memory for javadoc vm

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@241 50f2f4bb-b051-0410-bef5-90022cba6387

build.properties

@@ -6,6 +6,7 @@ project.key=SPR
 ivy.cache.dir=${basedir}/../ivy-cache
 integration.repo.dir=${basedir}/../integration-repo
 javadoc.exclude.package.names=org/springframework/samples/**
+javadoc.max.memory=256M
 
 # For when releasing
 #release.type=release