[hal] Add SystemCore to Java runtime type (#7932)

hal/src/main/java/edu/wpi/first/hal/HALUtil.java

@@ -43,6 +43,9 @@ public final class HALUtil extends JNIWrapper {
   /** Simulation runtime. */
   public static final int RUNTIME_SIMULATION = 2;
 
+  /** SystemCore. */
+  public static final int RUNTIME_SYSTEMCORE = 3;
+
   /**
    * Returns the FPGA Version number.
    *

hal/src/main/native/cpp/jni/HALUtil.cpp

@@ -35,6 +35,8 @@ static_assert(edu_wpi_first_hal_HALUtil_RUNTIME_ROBORIO2 ==
               HAL_Runtime_RoboRIO2);
 static_assert(edu_wpi_first_hal_HALUtil_RUNTIME_SIMULATION ==
               HAL_Runtime_Simulation);
+static_assert(edu_wpi_first_hal_HALUtil_RUNTIME_SYSTEMCORE ==
+              HAL_Runtime_SystemCore);
 
 static JavaVM* jvm = nullptr;
 static JException illegalArgExCls;