renamed unittest to buildtest

.gitlab-ci.yml

-unittest:
+buildtest:
     image: debian:stretch
     stage: test
     script:
@@ -7,10 +7,11 @@ unittest:
     - apt install -y locales-all git build-essential  make libavformat-dev libavcodec-dev libavfilter-dev libavutil-dev libxml2-dev libcurl4-openssl-dev
     - make
     artifacts:
-        paths:
-	- probe
-	- probe-raw
-	- remux thumbnail
-	- transcode
-	- publish_video
-	- simple_live_transcode
+      paths:
+      - probe
+      - probe-raw
+      - remux thumbnail
+      - transcode
+      - publish_video
+      - simple_live_transcode
+      :