Summary:
If a user has their shell set to a non-POSIX conferment shell the TestTerminal.py tests fail because the shell blurb constructed here may not work in their shell.
In my specific case fish-shell (The Friendly Interactive Shell - http://fishshell.com) does not support $?, it instead uses $status (because it is friendly).
This patch removes the assumption of your default shell by running the constructed bash command via "/bin/bash -c ...". This should be safer for users mutating their shell environment.
Reviewers: tfiala
Subscribers: joerg, lldb-commits
Differential Revision: https://reviews.llvm.org/D25750
llvm-svn: 284552
b47711ab27