drone: build on both debian stable and unstable

.drone.yml

@@ -1,18 +1,41 @@
 ---
-pipeline:
-  prep:
-    image: library/debian:unstable
-    docker:
-      tty: true
-    commands:
-      - apt-get update
-      - apt-get -y remove man-db
-      - apt-get -y install devscripts git-buildpackage locales
-      - echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen
-      - locale-gen
-      - mk-build-deps --install -t'apt-get -y'
-      - mkdir build
-      - cd build
-      - cmake ..
-      - make
-      - LANG="en_US.UTF-8" ./notcurses-tester
+kind: pipeline
+type: docker
+name: debian-unstable
+
+steps:
+- name: build
+  image: dankamongmen/unstable_builder:2019-12-18
+  commands:
+    - apt-get update
+    - apt-get -y remove man-db
+    - apt-get -y dist-upgrade
+    - apt-get -y install devscripts git-buildpackage locales
+    - echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen
+    - locale-gen
+    - mk-build-deps --install -t'apt-get -y'
+    - autoreconf -fis
+    - ./configure
+    - make
+    - env LANG="en_US.UTF-8" make check
+---
+kind: pipeline
+type: docker
+name: debian-stable
+
+steps:
+- name: build
+  image: library/debian:stable
+  commands:
+    - echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen
+    - apt-get update
+    - apt-get -y remove man-db
+    - apt-get -y dist-upgrade
+    - apt-get -y install devscripts git-buildpackage locales
+    - echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen
+    - locale-gen
+    - mk-build-deps --install -t'apt-get -y'
+    - autoreconf -fis
+    - ./configure
+    - make
+    - env LANG="en_US.UTF-8" make check