When printing AbstractBuild.BuildingRemotely message to log, also indicate any...

When printing AbstractBuild.BuildingRemotely message to log, also indicate any (non-self) labels of the node.
This is invaluable when diagnosing problems with a build on a cloud slave after the slave has been deprovisioned.
If the node name by itself does not indicate what type of machine it was, you would have a hard time guessing.

core/src/main/java/hudson/model/AbstractBuild.java

@@ -36,6 +36,7 @@ import hudson.console.ModelHyperlinkNote;
 import hudson.matrix.MatrixConfiguration;
 import hudson.model.Fingerprint.BuildPtr;
 import hudson.model.Fingerprint.RangeSet;
+import hudson.model.labels.LabelAtom;
 import hudson.model.listeners.RunListener;
 import hudson.model.listeners.SCMListener;
 import hudson.scm.ChangeLogParser;
@@ -540,11 +541,30 @@ public abstract class AbstractBuild<P extends AbstractProject<P,R>,R extends Abs
             this.listener = listener;
 
             launcher = createLauncher(listener);
-            if (!Jenkins.getInstance().getNodes().isEmpty())
-                listener.getLogger().print(node instanceof Jenkins ? Messages.AbstractBuild_BuildingOnMaster() : 
-                    Messages.AbstractBuild_BuildingRemotely(ModelHyperlinkNote.encodeTo("/computer/" + builtOn, builtOn)));
-            else
-            	listener.getLogger().print(Messages.AbstractBuild_Building());
+            if (!Jenkins.getInstance().getNodes().isEmpty()) {
+                if (node instanceof Jenkins) {
+                    listener.getLogger().print(Messages.AbstractBuild_BuildingOnMaster());
+                } else {
+                    listener.getLogger().print(Messages.AbstractBuild_BuildingRemotely(ModelHyperlinkNote.encodeTo("/computer/" + builtOn, builtOn)));
+                    Set<LabelAtom> assignedLabels = new HashSet<LabelAtom>(node.getAssignedLabels());
+                    assignedLabels.remove(node.getSelfLabel());
+                    if (!assignedLabels.isEmpty()) {
+                        boolean first = true;
+                        for (LabelAtom label : assignedLabels) {
+                            if (first) {
+                                listener.getLogger().print(" (");
+                                first = false;
+                            } else {
+                                listener.getLogger().print(' ');
+                            }
+                            listener.getLogger().print(label.getName());
+                        }
+                        listener.getLogger().print(')');
+                    }
+                }
+            } else {
+                listener.getLogger().print(Messages.AbstractBuild_Building());
+            }
             
             lease = decideWorkspace(node, Computer.currentComputer().getWorkspaceList());