For Travis CI - fix the software package deps for Annotate build.

[ci only: Annotate]

.travis.yml

@@ -165,7 +165,7 @@ language: cpp
 compiler: gcc
 cache: ccache
 sudo: false
-addons: {apt: {sources: [kubuntu-backports, ubuntu-toolchain-r-test], packages: [cmake, g++-4.9]}}
+addons: {apt: {sources: [kubuntu-backports, ubuntu-toolchain-r-test], packages: [cmake, g++-4.9, libasound2-dev]}}
 env:
   global:
     - secure: DE9IUM+pIV757GU0ccfDJhA752442pKu3DyBthrzHW9+GbsqbfuJOx045CYNN5vOWutFPC0A51B9WxhLNpXXqD3mfU8MhP1gkF7SskrHvcAPrCyfdqZf1Q8XDP5phm2KbHhhwxQMYmmicd6yj8DPNy2wRoSgPSDp/ZUDk51XZDU=