Tests: Use real project dependencies in memcheck test

Change-Id: Iced26e5b2a4a4ba5e1075e19eeffe96b2e298d0f
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

tests/auto/valgrind/memcheck/memcheck.pro

 TEMPLATE = subdirs
-CONFIG += ordered
-SUBDIRS += parsertests.pro modeldemo.pro testapps testrunner.pro
+
+parsertests.file = parsertests.pro
+
+modeldemo.file = modeldemo.pro
+
+testapps.depends = modeldemo parsertests
+
+testrunner.file = testrunner.pro
+testrunner.depends = testapps
+
+SUBDIRS += parsertests modeldemo testapps testrunner
+
+