Updating README #13

Job	Run time
cross compilation	27s
lint code	1m 13s
RPC and mobile compilation check	3m 56s
Sqlc check	25s
check commits	0s
check pinned dependencies (google.golang.org/grpc v1.53.0)	7s
check release notes updated	4s
check pinned dependencies (github.com/golang/protobuf v1.5.2)	5s
sample configuration check	31s
run ubuntu itests (btcd, backend=btcd)	1m 15s
run unit tests (btcd unit-cover)	11m 37s
run ubuntu itests (bitcoind, backend=bitcoind)	1m 21s
run windows itest	5m 26s
run unit tests (unit tags="kvdb_etcd")	21m 20s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	1m 25s
run unit tests (unit tags="kvdb_postgres")	18m 19s
run unit tests (unit tags="kvdb_sqlite")	19m 28s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling")	1m 14s
run unit tests (btcd unit-race)	40m 51s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	1m 20s
run unit tests (unit-module)	1m 25s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1m 32s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	1m 19s
run ubuntu itests (neutrino, backend=neutrino)	1m 22s
	2h 16m 2s

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