TBR renaming v.io/core/veyron to v.io/x/ref

(and getting rid of unused shell scripts)

MultiPart: 5/13
Change-Id: I09d9df0f4dc7df3d5ca5588513be27b08fe1fd4a
diff --git a/security/agent/client.go b/security/agent/client.go
index 92a33ab..f8cb435 100644
--- a/security/agent/client.go
+++ b/security/agent/client.go
@@ -7,8 +7,6 @@
 	"net"
 	"os"
 
-	"v.io/core/veyron/lib/unixfd"
-	"v.io/core/veyron/security/agent/cache"
 	"v.io/v23/context"
 	"v.io/v23/ipc"
 	"v.io/v23/naming"
@@ -16,6 +14,8 @@
 	"v.io/v23/security"
 	"v.io/v23/vtrace"
 	"v.io/x/lib/vlog"
+	"v.io/x/ref/lib/unixfd"
+	"v.io/x/ref/security/agent/cache"
 )
 
 // FdVarName is the name of the environment variable containing