[FIXED HUDSON-5884] Making compilable with JDK 7 javac.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@30701 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/Functions.java

@@ -657,7 +657,7 @@ public class Functions {
     }
 
     public static List<Descriptor<ComputerLauncher>> getComputerLauncherDescriptors() {
-        return Hudson.getInstance().getDescriptorList(ComputerLauncher.class);
+        return Hudson.getInstance().<ComputerLauncher,Descriptor<ComputerLauncher>>getDescriptorList(ComputerLauncher.class);
     }
 
     public static List<Descriptor<RetentionStrategy<?>>> getRetentionStrategyDescriptors() {