Added stubs for bochs and virtualbox, to be filled out.

.travis.yml

@@ -5,9 +5,19 @@ addons:
     packages:
       - qemu
       - qemu-system-x86
+      - qemu-system-arm
+      - virtualbox
+      - bochs
+      - sikuli-ide
 
 install:
   - true # Nothing to do for now.
 
+env:
+  - MODE=qemu-system-i386
+  - MODE=qemu-system-arm
+  - MODE=virtualbox
+  - MODE=bochs
+
 script:
-  - ./test_os.sh qemu-system-i386  
+  - ./test/${MODE}.sh

test/bochs.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+set -e
+
+bochs --help

test/qemu-system-arm.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+set -e
+
+qemu-system-arm -M help

test/qemu-system-i386.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+set -e
+
+qemu-system-i386 --help

test/virtualbox.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+set -e
+
+VirtualBox --help

test_os.sh

@@ -1,6 +0,0 @@
-#!/bin/sh
-set -e
-
-mode="$1"
-
-qemu-system-i386 --help