base-files: allow to skip unwanted scripts

this change allows one to selectively "hush" scripts from /etc/profile.d/ directory.
e.g., to skip "opkg to apk cheatsheet" message ("/etc/profile.d/apk-cheatsheet.sh") create empty file "/etc/profile.d/apk-cheatsheet.hush" using, for example, command "touch /etc/profile.d/apk-cheatsheet.hush"

Signed-off-by: Konstantin Demin <[email protected]>
Link: openwrt/openwrt#19953
Signed-off-by: Robert Marko <[email protected]>

Author: rockdrilla

package/base-files/files/etc/profile

@@ -32,6 +32,7 @@ esac
 
 if [ -z "$FAILSAFE" ] ; then
 	for FILE in /etc/profile.d/*.sh ; do
+		[ -f "${FILE%.sh}.hush" ] && continue
 		[ -f "$FILE" ] && . "$FILE"
 	done
 	unset FILE