Adding missing unit tests to Makefile.

Makefile

@@ -27,24 +27,31 @@ build:
 # the ones that are commented out don't pass
 unit_test:
 	cd go/bson; go test
+	cd go/bufio2; go test
 	cd go/bytes2; go test
 	cd go/cache; go test
 	cd go/cgzip; go test
+	cd go/cmd/vtctld; go test
 	cd go/cmd/zkns2pdns; go test
 	cd go/hack; go test
 #	cd go/logfile; go test
 	if [ -e "/usr/bin/memcached" ]; then \
 		cd go/memcache; exec go test ; \
 	fi
+	cd go/mysql/proto; go test
 	cd go/pools; go test
+	cd go/relog; go test
 	cd go/rpcplus; go test
 	cd go/rpcplus/jsonrpc; go test
 	cd go/rpcwrap/auth; go test
+	cd go/sqltypes; go test
 	cd go/stats; go test
 	cd go/timer; go test
 	cd go/umgmt; go test
 	cd go/vt/client2; go test
 	cd go/vt/dbconfigs; go test
+	cd go/vt/env; go test
+	cd go/vt/key; go test
 	cd go/vt/mysqlctl; go test
 	cd go/vt/sqlparser; go test
 	cd go/vt/tabletserver; go test