fix SVD for complex-valued matrix

[k3kaimu]

The SVD for a complex-valued matrix can now be performed.

The size of rwork was determined by referring to the following documents:

• gesvd: http://www.netlib.org/lapack/explore-html/d3/da8/group__complex16_g_esing_gad6f0c85f3cca2968e1ef901d2b6014ee.html
• gesdd: http://www.netlib.org/lapack/explore-html/d3/da8/group__complex16_g_esing_gaccb06ed106ce18814ad7069dcb43aa27.html