config.guess [...]: Use a four-part configuration name for gnu so it can be distinguished from...

Thu Nov 21 16:42:41 1996  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* config.guess [UNAME_SYSTEM == GNU]: Use a four-part
	configuration name for gnu so it can be distinguished from
	foo-foo-linux-gnu with simple globbing patterns.

From-SVN: r13214

gcc/config.guess

@@ -397,7 +397,7 @@ EOF
 	echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
 	exit 0 ;;
     *:GNU:*:*)
-	echo `echo ${UNAME_MACHINE}|sed -e 's,/.*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'`
+	echo `echo ${UNAME_MACHINE}|sed -e 's,/.*$,,'`-unknown-gnu-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'`
 	exit 0 ;;
     *:Linux:*:*)
 	# The BFD linker knows what the default object file format is, so