Add .externalToolBuilders to svn:ignore.

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1481315 13f79535-47bb-0310-9956-ffa450edef68
Add maven-eclipse.xml to svn:ignore.

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1481316 13f79535-47bb-0310-9956-ffa450edef68