make SparseSolverBase and IterativeSolverBase move constructable

Eigen/src/IterativeLinearSolvers/IterativeSolverBase.h

@@ -188,6 +188,9 @@ public:
     compute(matrix());
   }
 
+
+  IterativeSolverBase(IterativeSolverBase&&) = default;
+
   ~IterativeSolverBase() {}
 
   /** Initializes the iterative solver for the sparsity pattern of the matrix \a A for further solving \c Ax=b problems.

Eigen/src/SparseCore/SparseSolverBase.h

@@ -75,6 +75,8 @@ class SparseSolverBase : internal::noncopyable
       : m_isInitialized(false)
     {}
 
+    SparseSolverBase(SparseSolverBase&&other ) : internal::noncopyable{}, m_isInitialized{other.m_isInitialized} {}
+
     ~SparseSolverBase()
     {}