perf: Add HOMEPAGE info into recipe file.

(From OE-Core rev: c46e49c06e16e46422f925662cd2c8c698dc04ee)

Signed-off-by: Fan Xin <fan.xin@jp.fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-kernel/perf/perf.bb

@@ -5,6 +5,7 @@ performance analysis. It covers hardware level \
 (CPU/PMU, Performance Monitoring Unit) features \
 and software features (software counters, tracepoints) \
 as well."
+HOMEPAGE = "https://perf.wiki.kernel.org/index.php/Main_Page"
 
 LICENSE = "GPLv2"