Add libglfw2 to ubuntu-precise; resolves travis-ci/apt-package-whitelist#933
Add libglfw2 to ubuntu-precise; resolves travis-ci/apt-package-whitelist#933

Packages: libglfw2 libglfw-dev

phw/apt-package-whitelist,AlCutter/apt-package-whitelist,jmerkow/apt-package-whitelist,AlCutter/apt-package-whitelist,phw/apt-package-whitelist,travis-ci/apt-package-whitelist,travis-ci/apt-package-whitelist,christophgysin/apt-package-whitelist,christophgysin/apt-package-whitelist,jmerkow/apt-package-whitelist