Fix name of gmad binary.

This probably should be fixed in the image itself and then reverted on this repository.

Jenkinsfile

@@ -2,7 +2,7 @@ node('linux && amd64 && docker') {
   docker.image('icedream/gmad:latest').inside {
     ansiColor('xterm') {
       checkout scm
-      sh 'gmad create -folder . -out icedream-tauntmenu.gma'
+      sh 'gmad_linux create -folder . -out icedream-tauntmenu.gma'
       archive '*.gma'
     }
   }