7058174: Reduce langtools build warnings

Reviewed-by: jjg
Contributed-by: alexandre.boulgakov@oracle.com

make/build.xml

@@ -336,7 +336,9 @@
             classpath="${dist.lib.dir}/javac.jar"
             includeAntRuntime="no"
             debug="${javac.debug}"
-            debuglevel="${javac.debuglevel}"/>
+            debuglevel="${javac.debuglevel}">
+            <compilerarg line="${javac.lint.opts}"/>
+        </javac>
         <java fork="true"
             jvm="${target.java.home}/bin/java"
             dir="test/tools/javac/diags"
@@ -857,7 +859,10 @@
                srcdir="${make.tools.dir}/CompileProperties"
                destdir="${build.toolclasses.dir}/"
                classpath="${ant.core.lib}"
-               includeantruntime="false"/>
+               bootclasspath="${boot.java.home}/jre/lib/rt.jar"
+               includeantruntime="false">
+            <compilerarg line="${javac.lint.opts}"/>
+        </javac>
         <taskdef name="pcompile"
                  classname="CompilePropertiesTask"
                  classpath="${build.toolclasses.dir}/"/>
@@ -874,6 +879,7 @@
                classpath="${ant.core.lib}"
                includeantruntime="false">
             <compilerarg value="-Xbootclasspath/p:${build.bootstrap.dir}/classes"/>
+            <compilerarg line="${javac.lint.opts}"/>
         </javac>
         <taskdef name="genstubs"
                  classname="GenStubs$$Ant"

make/tools/CompileProperties/CompileProperties.java

@@ -222,13 +222,13 @@ public class CompileProperties {
                 sortedKeys.add((String)key);
             }
             Collections.sort(sortedKeys);
-            Iterator keys = sortedKeys.iterator();
+            Iterator<String> keys = sortedKeys.iterator();
 
             StringBuffer data = new StringBuffer();
 
             while (keys.hasNext()) {
-                Object key = keys.next();
-                data.append("            { \"" + escape((String)key) + "\", \"" +
+                String key = keys.next();
+                data.append("            { \"" + escape(key) + "\", \"" +
                         escape((String)p.get(key)) + "\" },\n");
             }