MAINTAINERS: Add an entry for the include/sysemu/rng*.h files

These headers are used by the virtio-rng and rng backends code,
so they should be listed in the same section in MAINTAINERS, too.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NAmit Shah <amit.shah@redhat.com>
Message-Id: <1456404260-26928-1-git-send-email-thuth@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>

MAINTAINERS

@@ -921,6 +921,7 @@ M: Amit Shah <amit.shah@redhat.com>
 S: Supported
 F: hw/virtio/virtio-rng.c
 F: include/hw/virtio/virtio-rng.h
+F: include/sysemu/rng*.h
 F: backends/rng*.c
 
 nvme