Suppress a deprecation warning about requesting an old AST version

Near as I can tell, the request for a deprecated version here is
intentional.  The non-deprecated version (AST.JLS8) is the latest and
greatest, but as far as I can tell we really do want the older version
here.

com.ibm.wala.ide.jdt/source/com/ibm/wala/ide/util/JdtUtil.java

@@ -578,6 +578,7 @@ public class JdtUtil {
   }
 
   public static ASTNode getAST(IFile javaSourceFile) {
+	  @SuppressWarnings("deprecation")
 	  ASTParser parser = ASTParser.newParser(AST.JLS3);
 	  parser.setSource(JavaCore.createCompilationUnitFrom(javaSourceFile));
 	  parser.setProject(JavaCore.create(javaSourceFile.getProject()));