QAR-1619: Remove unneeded llfloatertos.h #includes.

Neither lllogininstance.cpp nor lllogininstance_test.cpp need llfloatertos.h
any more, since LLLoginInstance talks to LLFloaterTOS only via LLFloaterReg
and LLEventPumps. However, both sources depended on llfloatertos.h dragging in
llnotifications.h, so include that explicitly instead of llfloatertos.h.

indra/newview/lllogininstance.cpp

@@ -50,7 +50,7 @@
 #include "llviewercontrol.h"
 #include "llurlsimstring.h"
 #include "llfloaterreg.h"
-#include "llfloatertos.h"
+#include "llnotifications.h"
 #include "llwindow.h"
 #if LL_LINUX || LL_SOLARIS
 #include "lltrans.h"

indra/newview/tests/lllogininstance_test.cpp

@@ -91,7 +91,7 @@ LLURLSimString LLURLSimString::sInstance;
 bool LLURLSimString::parse() { return true; }
 
 //-----------------------------------------------------------------------------
-#include "../llfloatertos.h"
+#include "llnotifications.h"
 #include "llfloaterreg.h"
 static std::string gTOSType;
 static LLEventPump * gTOSReplyPump = NULL;