virt-aa-helper: add missing include

Regression introduced in commit 02e86910.

* src/security/virt-aa-helper.c (includes): Reflect move of virRun.

src/security/virt-aa-helper.c

@@ -31,6 +31,7 @@
 #include "buf.h"
 #include "util.h"
 #include "memory.h"
+#include "command.h"
 
 #include "security_driver.h"
 #include "security_apparmor.h"