Added additional comments to some commands for clarification.

Change RIL_UNSOL_CDMA_SUBSCRIPTION_CHANGED to
RIL_UNSOL_CDMA_SUBSCRIPTION_SOURCE_CHANGED.

Change-Id: Id946447c6ee9777696c3d7fa1a664ee7dc7deeba
diff --git a/libril/ril.cpp b/libril/ril.cpp
index bb53926..68046a8 100644
--- a/libril/ril.cpp
+++ b/libril/ril.cpp
@@ -3219,7 +3219,7 @@
         case RIL_UNSOL_OEM_HOOK_RAW: return "UNSOL_OEM_HOOK_RAW";
         case RIL_UNSOL_RINGBACK_TONE: return "UNSOL_RINGBACK_TONE";
         case RIL_UNSOL_RESEND_INCALL_MUTE: return "UNSOL_RESEND_INCALL_MUTE";
-        case RIL_UNSOL_CDMA_SUBSCRIPTION_CHANGED: return "UNSOL_CDMA_SUBSCRIPTION_CHANGED";
+        case RIL_UNSOL_CDMA_SUBSCRIPTION_SOURCE_CHANGED: return "UNSOL_CDMA_SUBSCRIPTION_CHANGED";
         case RIL_UNSOL_CDMA_PRL_CHANGED: return "UNSOL_CDMA_PRL_CHANGED";
         case RIL_UNSOL_EXIT_EMERGENCY_CALLBACK_MODE: return "UNSOL_EXIT_EMERGENCY_CALLBACK_MODE";
         case RIL_UNSOL_RIL_CONNECTED: return "UNSOL_RIL_CONNECTED";