Remove double build

.gitlab-ci.yml

@@ -3,20 +3,12 @@ image: debian:stretch
 before_script:
   - dpkg --add-architecture i386
   - apt-get update
-  - apt-get install libx11-dev:i386 libc6-dev-i386 build-essential  -y
-  - apt-get install libx11-dev libc6-dev build-essential  -y
+  - apt-get install libx11-dev:i386 libc6-dev-i386 libx11-dev libc6-dev build-essential  -y
 
-make-32bit:
+make:
   stage: build
   script:
-    - ARCH_OPT='-m32' make
-  tags:
-    - docker
-
-make-64bit:
-  stage: build
-  script:
-    - ARCH_OPT='-m64' make
+    - make
   tags:
     - docker