bash-completion: fix 'files already exist' WARNING message

Some bash completion commands are already provided by util-linux recipe.
Also disable parallel build because "symlinks" rule is buggy (see completions/Makefile.am).

Signed-off-by: Matthieu CRAPET <Matthieu.CRAPET@ingenico.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
bash-completion: update to version 2.1

Notes:
- PARALLEL_MAKE is still required
- inherit allarch is not present because of runtime dependency with bash (TUNE_PKGARCH)

Signed-off-by: Matthieu Crapet <Matthieu.Crapet@ingenico.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
cloud9: Fix branch param

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>