Remove HAVE_SELINUX guards

Android 4.3, and by extension CM 10.2, default to having SELinux on

Change-Id: Ie7853727102725a75a7d6fa3b3b35b1ffaacd89a
Merge remote-tracking branch 'cyanogen/cm-10.2' into cm-10.2
Merge branch 'cm-10.2' of https://github.com/Quarx2k/android_system_core into PAC4.3