Fix qmake builds

We did some changes in the .cpp files of some tests when converting
the build system to CMake, but didn't adjust the .pro files which
caused tests to fail when doing a qmake build.

Make the required changes. Was discovered when doing a test
wip/cmake -> dev merge.

Change-Id: I407a982412cb44df592a38a4cb997968bdfe3304
Reviewed-by: Qt CMake Build Bot
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

tests/auto/corelib/serialization/qdatastream/qdatastream.pro

@@ -3,6 +3,8 @@ TARGET = tst_qdatastream
 QT += testlib
 SOURCES = tst_qdatastream.cpp
 
+DEFINES -= QT_NO_LINKED_LIST
+
 TESTDATA += datastream.q42
 
 android:!android-embedded {

tests/auto/dbus/qdbusinterface/qmyserver/qmyserver.pro

@@ -1,6 +1,6 @@
 SOURCES = qmyserver.cpp
 HEADERS = ../myobject.h
-TARGET = qmyserver
+TARGET = qmyserver_qdbusinterface
 DESTDIR = ./
 QT = core dbus
 CONFIG -= app_bundle