localmodconfig: Fix parsing of "help" text

Help text may start with "help" or "---help---". This patch fixes
read_kconfig() to recognize the second variant.

This removes useless junk from %depends and %selects. That junk is due to
help text that contains the words "selects" and "depends".

Link: http://lkml.kernel.org/r/1460333193-16361-2-git-send-email-bpoirier@suse.com



Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>