Modified TravisCI script in order to get the latest Shellcheck

Author: frenck

.travis.yml

@@ -12,9 +12,9 @@ before_install:
     - sudo apt-get -qq update
     - sudo apt-get install -y cabal-install
     - cabal update
+    - git clone https://github.com/koalaman/shellcheck.git
     - cd shellcheck
     - cabal install
-    - git clone https://github.com/koalaman/shellcheck.git
     - cd ..
     - export PATH="$HOME/.cabal/bin:$PATH"
     - gpg --keyserver hkp://keys.gnupg.net --recv-keys C4133165DF5EB4BAEABDADCACF1E7823C5339B59