[FIX] odoo-shippable: Install g++4.9 for new requirements of youcompleteme
The new version of youcompleteme require g++-4.9 instead of g++-4.8 https://github.com/Valloric/YouCompleteMe/commit/b20809332c3298cb954cff20006cb52955b54b2d#diff-354f30a63fb0907d4ad57269548329e3L37
This PR adding new ppa for install the version 4.9 of g++
Currently when I made one build of odoo-shippable show the following error
