Add the repository parameter to CR-global

It was part of https://cr.bazel.build/11553 but I forgot to export
the change before submitting.

Change-Id: Iad3dee54c04d7c0cae74b9143e1982c182fc012b

jenkins/jobs/CR-global.xml.tpl

diff --git a/jenkins/jobs/CR-global.xml.tpl b/jenkins/jobs/CR-global.xml.tpl
index 6d05ea3..9fccf6a 100644
--- a/jenkins/jobs/CR-global.xml.tpl
+++ b/jenkins/jobs/CR-global.xml.tpl
@@ -12,6 +12,11 @@
     <hudson.model.ParametersDefinitionProperty>
       <parameterDefinitions>
         <hudson.model.StringParameterDefinition>
+          <name>REPOSITORY</name>
+          <description>The repository to build</description>
+          <defaultValue>https://bazel.googlesource.com/bazel</defaultValue>
+        </hudson.model.StringParameterDefinition>
+        <hudson.model.StringParameterDefinition>
           <name>BRANCH</name>
           <description>The branch to build</description>
           <defaultValue>master</defaultValue>