hello-mod: Add comment for kernel module package naming

modules bbclass renames kernel module packages with "kernel-module-" prefix
automatically.

(From OE-Core rev: 6640f312062ad6648459f0b75086e9a8614300a9)

Signed-off-by: Yang Shi <yang.shi@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-skeleton/recipes-kernel/hello-mod/hello-mod_0.1.bb

@@ -13,3 +13,6 @@ SRC_URI = "file://Makefile \
           "
 
 S = "${WORKDIR}"
+
+# The inherit of module.bbclass will automatically name module packages with
+# "kernel-module-" prefix as required by the oe-core build environment.