Add the configuration tests.

Add the list of tests to sync.profile, and make sure each test only happens
on the platforms it's intended for.

Change-Id: Id022a6b85b349f4a8a649d3449b622e4ada7f4f4
Reviewed-on: http://codereview.qt.nokia.com/1910
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>

src/plugins/plugins.pro

@@ -13,7 +13,7 @@ win32 {
 }
 
 win32 {
-    contains(directshow_enabled, yes): SUBDIRS += directshow
+    contains(config_test_directshow, yes): SUBDIRS += directshow
 }
 
 simulator: SUBDIRS += simulator
@@ -34,7 +34,7 @@ unix:!mac {
 
     !maemo*:SUBDIRS += v4l
 
-    contains(pulseaudio_enabled, yes) {
+    contains(config_test_pulseaudio, yes) {
         SUBDIRS += pulseaudio
     }
 }