8325189: Enable this-escape javac warning in java.base

Reviewed-by: alanb, erikj, naoto, smarks, ihse, joehw, lancea, weijun

src/java.base/share/classes/java/util/zip/Deflater.java

@@ -196,6 +196,7 @@ public class Deflater {
      * @param level the compression level (0-9)
      * @param nowrap if true then use GZIP compatible compression
      */
+    @SuppressWarnings("this-escape")
     public Deflater(int level, boolean nowrap) {
         this.level = level;
         this.strategy = DEFAULT_STRATEGY;