Add maintainers to daemon/ and graph/

Signed-off-by: Solomon Hykes <solomon@docker.com>

daemon/MAINTAINERS

@@ -1 +1,6 @@
+Solomon Hykes <solomon@docker.com> (@shykes)
+Victor Vieux <vieux@docker.com> (@vieux)
+Michael Crosby <michael@crosbymichael.com> (@crosbymichael)
+Cristian Staretu <cristian.staretu@gmail.com> (@unclejack)
+Tibor Vass <teabee89@gmail.com> (@tiborvass)
 volumes.go: Brian Goff <cpuguy83@gmail.com> (@cpuguy83)

graph/MAINTAINERS

@@ -0,0 +1,5 @@
+Solomon Hykes <solomon@docker.com> (@shykes)
+Victor Vieux <vieux@docker.com> (@vieux)
+Michael Crosby <michael@crosbymichael.com> (@crosbymichael)
+Cristian Staretu <cristian.staretu@gmail.com> (@unclejack)
+Tibor Vass <teabee89@gmail.com> (@tiborvass)