Include jar for JSR-250

The @Generated annotation showed up in JSR-250 and then was bundled into
Java 1.6. For those of us stuck in a 1.5 world, there's fortunately a
nice tiny little jar with the necessary classes, so slurp that in.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6057 542714f4-19e9-0310-aa3c-eee0fc999fb1

.classpath

@@ -16,5 +16,6 @@
 		</accessrules>
 	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="var" path="EXT_LIBS_DIR/jsr250-api.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>

etc/libs-incl.xml

@@ -12,6 +12,7 @@
     <include name="guava.jar"/>
     <include name="guice.jar"/>
     <include name="javassist.jar"/>
+    <include name="jsr250-api.jar"/>
     <include name="junit4.jar"/>
     <include name="retroweaver-all-1.2.2.jar"/>
     <include name="samskivert.jar"/>