Portable: update portable project

src/Portable/Portable.csproj

@@ -891,6 +891,9 @@
     <Compile Include="..\Numerics\LinearAlgebra\Storage\DenseColumnMajorMatrixStorage.cs">
       <Link>LinearAlgebra\Storage\DenseColumnMajorMatrixStorage.cs</Link>
     </Compile>
+    <Compile Include="..\Numerics\LinearAlgebra\Storage\DiagonalMatrixStorage.cs">
+      <Link>LinearAlgebra\Storage\DiagonalMatrixStorage.cs</Link>
+    </Compile>
     <Compile Include="..\Numerics\LinearAlgebra\Storage\MatrixStorage.cs">
       <Link>LinearAlgebra\Storage\MatrixStorage.cs</Link>
     </Compile>
@@ -900,9 +903,6 @@
     <Compile Include="..\Numerics\LinearAlgebra\Storage\SparseCompressedRowMatrixStorage.cs">
       <Link>LinearAlgebra\Storage\SparseCompressedRowMatrixStorage.cs</Link>
     </Compile>
-    <Compile Include="..\Numerics\LinearAlgebra\Storage\SparseDiagonalMatrixStorage.cs">
-      <Link>LinearAlgebra\Storage\SparseDiagonalMatrixStorage.cs</Link>
-    </Compile>
     <Compile Include="..\Numerics\NumberTheory\IntegerTheory.cs">
       <Link>NumberTheory\IntegerTheory.cs</Link>
     </Compile>