Include thirdparty libraries with angle brackets (#5578)

wpimath/src/test/native/cpp/system/DiscretizationTest.cpp

@@ -2,11 +2,11 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#include <gtest/gtest.h>
-
 #include <functional>
 
-#include "Eigen/Eigenvalues"
+#include <Eigen/Eigenvalues>
+#include <gtest/gtest.h>
+
 #include "frc/EigenCore.h"
 #include "frc/system/Discretization.h"
 #include "frc/system/NumericalIntegration.h"

wpimath/src/test/native/cpp/system/LinearSystemIDTest.cpp

@@ -5,6 +5,7 @@
 #include <frc/system/LinearSystem.h>
 #include <frc/system/plant/DCMotor.h>
 #include <frc/system/plant/LinearSystemId.h>
+
 #include <gtest/gtest.h>
 
 #include "frc/system/plant/LinearSystemId.h"

wpimath/src/test/native/cpp/system/NumericalIntegrationTest.cpp

@@ -2,10 +2,10 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#include <gtest/gtest.h>
-
 #include <cmath>
 
+#include <gtest/gtest.h>
+
 #include "frc/system/NumericalIntegration.h"
 
 // Tests that integrating dx/dt = e^x works.

wpimath/src/test/native/cpp/system/RungeKuttaTimeVaryingTest.cpp

@@ -2,10 +2,10 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#include <gtest/gtest.h>
-
 #include <cmath>
 
+#include <gtest/gtest.h>
+
 #include "frc/system/RungeKuttaTimeVarying.h"
 
 namespace {