meta/recipes-rt: Add HOMEPAGE / DESCRIPTION

Added HOMEPAGE and DESCRIPTION for recipes with missing decriptions or homepage

[YOCTO #13471]

(From OE-Core rev: 3bb03e124b956310674845b5e1a4f755a8456ce7)

Signed-off-by: Dorinda Bassey <dorindabassey@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 95a86ac1c12414c1b4983880145aec55bd9a38a4)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-rt/rt-tests/rt-tests_1.1.bb

@@ -1,5 +1,6 @@
 SUMMARY = "Real-Time preemption testcases"
-HOMEPAGE = "https://rt.wiki.kernel.org/index.php/Cyclictest"
+HOMEPAGE = "https://wiki.linuxfoundation.org/realtime/documentation/start"
+DESCRIPTION = "The main aim of the PREEMPT_RT patch is to minimize the amount of kernel code that is non-preemptible Therefore several substitution mechanisms and new mechanisms are implemented."
 SECTION = "tests"
 DEPENDS = "linux-libc-headers virtual/libc"
 LICENSE = "GPLv2 & GPLv2+"