kconfig: Add static text for search information in help menu

Add few static text to explain how one can bring up the search dialog
box by pressing the forward slash key anywhere on this interface.
Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/mconf.c

@@ -161,6 +161,12 @@ static const char mconf_readme[] =
 "(especially with a larger number of unrolled categories) than the\n"
 "default mode.\n"
 "\n"
+
+"Search\n"
+"-------\n"
+"Pressing the forward-slash (/) anywhere brings up a search dialog box.\n"
+"\n"
+
 "Different color themes available\n"
 "--------------------------------\n"
 "It is possible to select different color themes using the variable\n"