bash: explicitly define NON_INTERACTIVE_LOGIN_SHELLS in CFLAGS
If NON_INTERACTIVE_LOGIN_SHELLS is defined, all login shells read the
startup files, even if they are not interactive.
This is the behaviour of other major distros like Ubuntu and Fedora.
We also need to set it so that when executing `su -l xxx -c env' command,
/etc/profile is parsed.
[YOCTO #5359]
[YOCTO #7137]
Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
