package/libapparmor: fix build on uclibc

package/libapparmor: fix build on uclibc

Fix build of version 3.0.0 with uclibc. While the patch is added in
package/libapparmor, it in fact fixes a build issue that only occurs
when building package/apparmor, but as both packages share the same
source, they also share the same patches.

Fixes:
 - http://autobuild.buildroot.org/results/aea20bd5539fad35385565ffeb7e6ac566507017

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>