Enable checkstyle on cscore, ntcore, wpiutil (#1032)

Also update to version 8.10.

cscore/src/dev/java/edu/wpi/cscore/DevMain.java

@@ -10,6 +10,9 @@ package edu.wpi.cscore;
 import edu.wpi.first.wpiutil.RuntimeDetector;
 
 public class DevMain {
+  /**
+   * Main method.
+   */
   public static void main(String[] args) {
     System.out.println("Hello World!");
     System.out.println(RuntimeDetector.getPlatformPath());