MAINTAINERS: add block tree repo URLs

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

MAINTAINERS

diff --git a/MAINTAINERS b/MAINTAINERS
index 02b85ee..836a024 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -639,6 +639,8 @@
 F: block*
 F: block/
 F: hw/block/
+T: git git://repo.or.cz/qemu/kevin.git block
+T: git git://github.com/stefanha/qemu.git block
 
 Character Devices
 M: Anthony Liguori <aliguori@amazon.com>