Fix comment typos.
Fix comment typos.

Fix comment typos in transpose_s16_4x4q() and transpose_u16_4x4q().

Change-Id: I21bcc1fb3fb880798e5a3927c3dbe81dd518c83b

webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx