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]

(From OE-Core rev: 33af68d62bb427c588f5eeecb75fbc31b55f8459)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/bash/bash.inc

@@ -9,6 +9,11 @@ inherit autotools gettext texinfo update-alternatives ptest
 EXTRA_AUTORECONF += "--exclude=autoheader"
 EXTRA_OECONF = "--enable-job-control"
 
+# If NON_INTERACTIVE_LOGIN_SHELLS is defined, all login shells read the
+# startup files, even if they are not interactive.
+# This is what other major distros do. And this is what we wanted. See bug#5359 and bug#7137.
+CFLAGS += "-DNON_INTERACTIVE_LOGIN_SHELLS"
+
 ALTERNATIVE_${PN} = "sh"
 ALTERNATIVE_LINK_NAME[sh] = "${base_bindir}/sh"
 ALTERNATIVE_TARGET[sh] = "${base_bindir}/bash"