Update CI scripts for integration test post

.travis.yml

@@ -27,6 +27,18 @@ branches:
 cache:
   directories:
     - $HOME/.cargo
+    - $HOME/Library/Caches/Homebrew
+
+addons:
+  apt:
+    packages:
+      - qemu-system-x86
+  homebrew:
+    packages:
+      - qemu
+
+install:
+  - if [ $TRAVIS_OS_NAME = windows ]; then choco install qemu; export PATH="/c/Program Files/qemu:$PATH"; fi
 
 before_script:
   - rustup component add rust-src
@@ -36,4 +48,5 @@ before_script:
 script:
   - bootimage build
   - cargo test
+  - bootimage test
   - cargo cache --autoclean