gnuconfig: Update README.buildroot.

GNU config is now managed in git so we cannot use the old method
of doing a cvs up to get the latest changes.

Signed-off-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/gnuconfig/README.buildroot

@@ -8,8 +8,12 @@ To use, just add this to your unpack rule in the package.mk:
 $(CONFIG_UPDATE) $(PACKAGE_DIR)/
 
 --- UPDATE ---
-This is a CVS checkout of the config project, so just run `cvs up` 
-to get the latest config.sub / config.guess files.
+GNU config is now managed in git, so to update:
+
+# git clone git://git.savannah.gnu.org/config.git
+# cp config/config.* .
+# for p in $(ls patches/*.patch); do patch -p0 < $p; done
+# rm -rf config
 
 A few local customizations are used to support uClibc so you may
 have to make sure they're still needed.  The patches are broken