CI: use ~/bkctld instead of /tmp

.Jenkinsfile

@@ -5,7 +5,7 @@ pipeline {
             agent {
                 docker {
                     image 'evolix/gbp:bullseye'
-                    args '-u root --privileged -v /tmp:/tmp'
+                    args '-u root --privileged -v ~/bkctld:/root/bkctld'
                 }
             }
             when {
@@ -30,7 +30,7 @@ pipeline {
                 script {
                     sh 'echo Dummy line to remove once something actually happens.'
                  /* No crendentials yet
-                    sh 'rsync -avP /tmp/bkctld/ droneci@pub.evolix.net:/home/droneci/bkctld/'
+                    sh 'rsync -avP ~/bkctld/ droneci@pub.evolix.net:/home/droneci/bkctld/'
                   */
                 }
             }

.drone.yml

@@ -16,8 +16,8 @@ steps:
   - git clean --force
   - gbp buildpackage -us -uc
   volumes:
-  - name: tmp
-    path: /tmp
+  - name: bkctld
+    path: ~/bkctld
   when:
     branch:
     - debian
@@ -31,16 +31,16 @@ steps:
     key:
       from_secret: drone_private_key
     target: /home/droneci/bkctld/
-    source: /tmp/bkctld/
+    source: ~/bkctld/
     delete: true
   volumes:
-  - name: tmp
-    path: /tmp
+  - name: bkctld
+    path: ~/bkctld
   when:
     branch:
     - debian
 
 volumes:
-- name: tmp
+- name: bkctld
   host:
-    path: /tmp
+    path: ~/bkctld