[build] Publish unit tests for examples (#5838)

wpilibcExamples/publish.gradle

@@ -22,6 +22,10 @@ task cppExamplesZip(type: Zip) {
     from('src/main/cpp/examples') {
         into 'examples'
     }
+
+    from('src/test/cpp/examples') {
+        into 'examples_test'
+    }
 }
 
 task cppTemplatesZip(type: Zip) {
@@ -35,6 +39,10 @@ task cppTemplatesZip(type: Zip) {
     from('src/main/cpp/templates') {
         into 'templates'
     }
+
+    from('src/test/cpp/templates') {
+        into 'templates_test'
+    }
 }
 
 task cppCommandsZip(type: Zip) {
@@ -48,6 +56,10 @@ task cppCommandsZip(type: Zip) {
     from('src/main/cpp/commands') {
         into 'commands'
     }
+
+    from('src/test/cpp/commands') {
+        into 'commands_test'
+    }
 }
 
 build.dependsOn cppTemplatesZip

wpilibcExamples/src/main/cpp/examples/examples.json

@@ -867,7 +867,8 @@
     ],
     "foldername": "UnitTest",
     "gradlebase": "cpp",
-    "commandversion": 2
+    "commandversion": 2,
+    "hasunittests": true
   },
   {
     "name": "SimpleDifferentialDriveSimulation",