Codechange: Explicitly move a few variables to avoid a copy constructor (fixes warning from clang)

src/3rdparty/squirrel/squirrel/sqcompiler.cpp

@@ -142,7 +142,7 @@ public:
 			break;
 		}
 		Lex();
-		return ret;
+		return std::move(ret);
 	}
 	bool IsEndOfStatement() { return ((_lex._prevtoken == '\n') || (_token == SQUIRREL_EOB) || (_token == '}') || (_token == ';')); }
 	void OptionalSemicolon()

src/3rdparty/squirrel/squirrel/sqfuncstate.cpp

@@ -502,14 +502,14 @@ SQObject SQFuncState::CreateString(const SQChar *s,SQInteger len)
 {
 	SQObjectPtr ns(SQString::Create(_sharedstate,s,len));
 	_table(_strings)->NewSlot(ns,(SQInteger)1);
-	return ns;
+	return std::move(ns);
 }
 
 SQObject SQFuncState::CreateTable()
 {
 	SQObjectPtr nt(SQTable::Create(_sharedstate,0));
 	_table(_strings)->NewSlot(nt,(SQInteger)1);
-	return nt;
+	return std::move(nt);
 }
 
 SQFunctionProto *SQFuncState::BuildProto()