libbinder: clarify RPC binder over kernel message

Socket (RPC) binders can be sent over sockets. This error message was
incorrect.

Bug: N/A
Test: N/A
Change-Id: I633b634ff5da4c10ffb554f2c290d481ac84f297
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 9f95167..6644187 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -233,7 +233,7 @@
                 ALOGE("null proxy");
             } else {
                 if (proxy->isRpcBinder()) {
-                    ALOGE("Sending a socket binder over RPC is prohibited");
+                    ALOGE("Sending a socket binder over kernel binder is prohibited");
                     return INVALID_OPERATION;
                 }
             }