Update Asm to pick up fixes for stack map generation

Issue: https://bugs.eclipse.org/bugs/show_bug.cgi?id=452056

lib/asm/build.xml

 	<!-- if you need this defining, use the jarjar-1.0.jar in this project -->
     <taskdef name="jarjar" classname="com.tonicsystems.jarjar.JarJarTask"/>
 
-	<target name="package" description="Jarjar asm-5.0.1.jar and prefix package name with aj">
-	        <jarjar destfile="asm-5.0.1.renamed.jar">
-	          <zipfileset src="asm-5.0.1.jar"/>
+	<target name="package" description="Jarjar asm-5.0.4.jar and prefix package name with aj">
+	        <jarjar destfile="asm-5.0.4.renamed.jar">
+	          <zipfileset src="asm-5.0.4.jar"/>
 	          <rule pattern="org.objectweb.asm.**" result="aj.org.objectweb.asm.@1"/>
 	        </jarjar>
 	</target> 

weaver/.classpath

 	<classpathentry kind="lib" path="/lib/bcel/bcel.jar" sourcepath="/lib/bcel/bcel-src.zip"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
 	<classpathentry combineaccessrules="false" kind="src" path="/org.aspectj.matcher"/>
-	<classpathentry kind="lib" path="/lib/asm/asm-5.0.1.renamed.jar"/>
+	<classpathentry kind="lib" path="/lib/asm/asm-5.0.4.renamed.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>