Add support for su daemon installation and detection in recovery zip.

Change-Id: I09f2d2be61c9e8c5dec755de05227d41e08e4de8
Superuser 4.3 fixes.

Add support for su daemon to work around SELinux policies
and new capset on zygote/dalvik.

Change-Id: I2bdc7ef61dc17430a878e13dd098e6d0c004ddb2

Conflicts:
	Android.mk
	Superuser/assets/install-recovery.sh
	Superuser/jni/su/daemon.c

 Author:    Koushik Dutta <koushd@gmail.com>
 On branch cm-10.2
 Changes to be committed:
	modified:   Android.mk
	modified:   Superuser/assets/install-recovery.sh
	modified:   Superuser/jni/su/daemon.c