ci: add buster build job for securedrop-log

.circleci/config.yml

@@ -63,6 +63,17 @@ common-steps:
         echo $PKG_NAME > ~/packaging/sd_package_name
         echo 'export PKG_NAME=$(cat ~/packaging/sd_package_name)' >> $BASH_ENV
 
+  - &clonesecuredroplog
+    run:
+      name: Clone the repository to be packaged
+      command: |
+        mkdir ~/packaging && cd ~/packaging
+        git clone https://github.com/freedomofpress/securedrop-log.git
+        export PKG_NAME="securedrop-log"
+        # Enable access to this env car in subsequent run steps
+        echo $PKG_NAME > ~/packaging/sd_package_name
+        echo 'export PKG_NAME=$(cat ~/packaging/sd_package_name)' >> $BASH_ENV
+
   - &clonesecuredropexport
     run:
       name: Clone the repository to be packaged
@@ -163,6 +174,18 @@ jobs:
             pip install -r test-requirements.txt
             make test
 
+  build-buster-securedrop-log:
+    docker:
+      - image: circleci/python:3.7-buster
+    steps:
+      - checkout
+      - *installdeps
+      - *fetchwheels
+      - *clonesecuredroplog
+      - *getlatestreleasedversion
+      - *makesourcetarball
+      - *builddebianpackage
+
   build-stretch-securedrop-client:
     docker:
       - image: circleci/python:3.5-stretch
@@ -365,6 +388,7 @@ workflows:
       - build-buster-securedrop-workstation-svs-disp
       - build-stretch-securedrop-export
       - build-buster-securedrop-export
+      - build-buster-securedrop-log
 
 # Nightly jobs for each package are run in series to ensure there are no
 # conflicts or race conditions when committing deb packages to git-lfs.