autoconf config.* claims to not know about auroraux triple.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89301 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/autoconf/config.guess b/autoconf/config.guess
index e792aac..865fe53 100755
--- a/autoconf/config.guess
+++ b/autoconf/config.guess
@@ -333,6 +333,10 @@
     sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
 	echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
 	exit ;;
+    i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*)
+	AUX_ARCH="i386"
+	echo ${AUX_ARCH}-pc-auroraux`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit ;;
     i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*)
 	eval $set_cc_for_build
 	SUN_ARCH="i386"