package/libapparmor: fix build on musl

package/libapparmor: fix build on musl

Fix build of version 3.0.0 with musl. Since the apparmor and
libapparmor packages share the same sources, we also share their
patches: this is why the patch is added in package/libapparmor/3.0.0,
and a symlink package/apparmor/3.0.0 -> package/libapparmor/3.0.0 is
added.

Fixes:
 - http://autobuild.buildroot.org/results/22fb440240aa698acc68f026be790d5366c8f908

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