bash-completion2: fix broken relative path symlink
bash-completion2: fix broken relative path symlink

Closes #927.

Signed-off-by: Dominyk Tiller <53e438f55903875d07efdd98a8aaf887e7208dd3@gmail.com>

jimhe/homebrew-versions,coeligena/homebrew-verscustomized,Ashton-W/homebrew-versions,DomT4/homebrew-versions,heuermh/homebrew-versions,UniqMartin/homebrew-versions