readme: Point to jenkins.openbmc.org

Remove the reference to openpower.xyz, as we've shifted domains.

Change-Id: I2c14852691e1afec2ab88ae960a6ae623a3bdc0e
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/README.md b/README.md
index 34ad9c2..cbbfb5a 100644
--- a/README.md
+++ b/README.md
@@ -83,7 +83,7 @@
 
 ## Build Validation and Testing
 Commits submitted by members of the OpenBMC GitHub community are compiled and
-tested via our [Jenkins](https://openpower.xyz/) server.  Commits are run
+tested via our [Jenkins](https://jenkins.openbmc.org/) server. Commits are run
 through two levels of testing.  At the repository level the makefile `make
 check` directive is run.  At the system level, the commit is built into a
 firmware image and run with an arm-softmmu QEMU model against a barrage of