OpenBSD/m88k is now elf. Remove unneeded elf check.
Use X11/Xlib.h for checking where X11 can be found in stead of X11/XIntrinsic.h. Suggested by Pietro Cerutti. (backported from tclconfig)
Use X11/Xlib.h for checking where X11 can be found in stead of X11/XIntrinsic.h. Suggested by Pietro Cerutti. (backported from tclconfig)