Add libbz2-dev in Ubuntu dependencies
Add libbz2-dev in Ubuntu dependencies

`coinor-libclp-dev` depends on `libbz2-dev` but its dependency is broken and we need to explicitly add this as a fix.

[skip ci]
soonho-tri/dreal4,dreal/dreal4,dreal/dreal4,dreal/dreal4,soonho-tri/dreal4,soonho-tri/dreal4,soonho-tri/dreal4,dreal/dreal4