CLI: Decode stdin using client charset; add tests for description/display name

core/src/main/java/hudson/cli/GroovyCommand.java

@@ -87,7 +87,7 @@ private String loadScript() throws CmdLineException, IOException, InterruptedExc
         if (script == null)
             throw new CmdLineException(null, "No script is specified");
         if (script.equals("="))
-            return IOUtils.toString(stdin);
+            return IOUtils.toString(stdin, getClientCharset());
 
         checkChannel();
         return null; // never called

core/src/main/java/hudson/cli/SetBuildDescriptionCommand.java

@@ -30,14 +30,14 @@
 
     @Override
     protected int run() throws Exception {
-        Run run = job.getBuildByNumber(number);
+        Run<?, ?> run = job.getBuildByNumber(number);
         if (run == null)
             throw new IllegalArgumentException("No such build #" + number);
 
         run.checkPermission(Run.UPDATE);
 
         if ("=".equals(description)) {
-            description = IOUtils.toString(stdin);
+            description = IOUtils.toString(stdin, getClientCharset());
         }
 
         run.setDescription(description);

core/src/main/java/hudson/cli/SetBuildDisplayNameCommand.java

@@ -36,7 +36,7 @@
         run.checkPermission(Run.UPDATE);
 
         if ("-".equals(displayName)) {
-            displayName = IOUtils.toString(stdin);
+            displayName = IOUtils.toString(stdin, getClientCharset());
         }
 
         run.setDisplayName(displayName);