hydra: cuirass: Fix build product regexps.

* hydra/modules/sysadmin/services.scm (cuirass-specs): Turn the ‘job’
field of ‘build-output’ into actual regexps.

hydra/modules/sysadmin/services.scm

@@ -294,12 +294,12 @@ collection instead."
                 (build-outputs
                  (list
                   (build-output
-                   (job "iso9660-image*")
+                   (job "iso9660-image.*")
                    (type "ISO-9660")
                    (path ""))
                   #$@(images-outputs
                       (list
-                       "hurd-barebones.qcow2"
+                       "hurd-barebones\\.qcow2"
                        "pine64-barebones-raw-image"
                        "pinebook-pro-barebones-raw-image"))))
                 (period 86400)
@@ -311,7 +311,7 @@ collection instead."
                 (build-outputs
                  (list
                   (build-output
-                   (job "binary-tarball*")
+                   (job "binary-tarball.*")
                    (type "archive")
                    (path ""))))
                 (period 86400)