Update Eigen to the latest stable release, 3.2.2

./Eigen/src/Core/util/NonMPL2.h is left untouched, so that
usage of non MPL2 code is disabled.

Change-Id: I86fc9257b3c30d0ca15b268d4ef07bf038bba7ca
diff --git a/test/geo_parametrizedline.cpp b/test/geo_parametrizedline.cpp
index 4e1f845..f0462d4 100644
--- a/test/geo_parametrizedline.cpp
+++ b/test/geo_parametrizedline.cpp
@@ -18,13 +18,12 @@
   /* this test covers the following files:
      ParametrizedLine.h
   */
+  using std::abs;
   typedef typename LineType::Index Index;
   const Index dim = _line.dim();
   typedef typename LineType::Scalar Scalar;
   typedef typename NumTraits<Scalar>::Real RealScalar;
   typedef Matrix<Scalar, LineType::AmbientDimAtCompileTime, 1> VectorType;
-  typedef Matrix<Scalar, LineType::AmbientDimAtCompileTime,
-                         LineType::AmbientDimAtCompileTime> MatrixType;
   typedef Hyperplane<Scalar,LineType::AmbientDimAtCompileTime> HyperplaneType;
 
   VectorType p0 = VectorType::Random(dim);
@@ -35,7 +34,7 @@
   LineType l0(p0, d0);
 
   Scalar s0 = internal::random<Scalar>();
-  Scalar s1 = internal::abs(internal::random<Scalar>());
+  Scalar s1 = abs(internal::random<Scalar>());
 
   VERIFY_IS_MUCH_SMALLER_THAN( l0.distance(p0), RealScalar(1) );
   VERIFY_IS_MUCH_SMALLER_THAN( l0.distance(p0+s0*d0), RealScalar(1) );