crt: Rename dxerr.c to dxerr.def.h

This follows crt/complex. Accordingly changes dxerr{8,9}{,w}.c and
Makefile.am.

Signed-off-by: Zhongteng Gui <dragon-archer@outlook.com>
Signed-off-by: LIU Hao <lh_mouse@126.com>
6 files changed