Failed to load libGL.so

Here is the solution for error message 'Failed to load libGL.so' when launch Android Virtual Device (AVD) from Android Studio 0.2 on Ubuntu 13.04 32 bit:

Install 'Free Implementation of the OpenGL API-GLX development files' (libgl1-mesa-dev) package from Ubuntu Software Center

or type this command at terminal
sudo apt-get install libgl1-mesa-dev

Credit: http://learnedstuffs.wordpress.com/2012/07/17/fixing-ubuntu-error-failed-to-load-libgl-so/