meta: add missing description in recipes-extended

(From OE-Core rev: 3a4a037450f2998342818248957e7500950b0a66)

Signed-off-by: Maxime Roussin-Bélanger <maxime.roussinbelanger@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/cups/cups.inc

@@ -1,4 +1,8 @@
 SUMMARY = "An Internet printing system for Unix"
+DESCRIPTION = "The Common UNIX Printing System is a printing system and \
+general replacement for lpd and the like. It supports the Internet Printing \
+Protocol (IPP), and has its own filtering driver model for handling various \
+document types."
 HOMEPAGE = "https://www.cups.org/"
 SECTION = "console/utils"
 LICENSE = "GPLv2 & LGPLv2"

meta/recipes-extended/timezone/timezone.inc

@@ -1,4 +1,6 @@
 SUMMARY = "Timezone data"
+DESCRIPTION = "The Time Zone Database contains code and data that represent \
+the history of local time for many representative locations around the globe."
 HOMEPAGE = "http://www.iana.org/time-zones"
 SECTION = "base"
 LICENSE = "PD & BSD & BSD-3-Clause"

meta/recipes-extended/wget/wget.inc

@@ -1,4 +1,9 @@
 SUMMARY = "Console URL download utility supporting HTTP, FTP, etc"
+DESCRIPTION = "Wget is a network utility to retrieve files from the web using \
+HTTP(S) and FTP, the two most widely used internet protocols. It works \
+non-interactively, so it will work in the background, after having logged off. \
+The program supports recursive retrieval of web-authoring pages as well as \
+FTP sites"
 HOMEPAGE = "https://www.gnu.org/software/wget/"
 SECTION = "console/network"
 LICENSE = "GPLv3"