Aldy Hernandez and Andrew MacLeod as VRP maintainers

[Jeff Law via Gcc]

I am pleased to announce that the GCC Steering Committee has appointed 
Aldy Hernandez and Ian MacLeod as maintainers for the VRP subsystem 
(EVRP, VRP, Ranger).

Aldy/Andrew, please update the MAINTAINERS file appropriately.
Thanks,
jeff