diffutils: Add HOMEPAGE info into recipe file.

(From OE-Core rev: 1d0c86a760aed27f706d6fc16c5cef8d1f958873)

Signed-off-by: Huang Qiyu <huangqy.fnst@cn.fujitsu.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/diffutils/diffutils.inc

@@ -1,4 +1,5 @@
 SUMMARY = "Diffutils contains tools used for finding differences between files"
+HOMEPAGE = "https://www.gnu.org/software/diffutils/diffutils.html"
 DESCRIPTION = "Diffutils contains the GNU diff, diff3, \
 sdiff, and cmp utilities. These programs are usually \
 used for creating patch files."