sysv5.h: New file to describe UnixWare7/SVR5.

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	* i386/sysv5.h: New file to describe UnixWare7/SVR5.
	* configure.in (i?86-UnixWare7*-sysv): Use it.
	* i386/udk.h: Use sysv5.h.   Now uses Dwarf-2.

From-SVN: r26038

gcc/configure.in

@@ -1368,7 +1368,7 @@ changequote(,)dnl
 changequote([,])dnl
                xm_file="xm-alloca.h xm-siglist.h ${xm_file}"
                xm_defines="USG POSIX"
-               tm_file=i386/sysv4.h
+               tm_file=i386/sysv5.h
                if test x$stabs = xyes
                then
                        tm_file="${tm_file} dbx.h"