linsolver → linop 关系

文件在 src/shogun/mathematics/linalg/linsolver	在 src/shogun/mathematics/linalg/linop 中引用
CGMShiftedFamilySolver.cpp	LinearOperator.h
ConjugateGradientSolver.cpp	LinearOperator.h
ConjugateOrthogonalCGSolver.cpp	LinearOperator.h
DirectLinearSolverComplex.cpp	DenseMatrixOperator.h
DirectSparseLinearSolver.cpp	SparseMatrixOperator.h