Restore building of examples, tests.

Without this, a simple "configure && make" will not build the examples
or tests, even if the "-make tests -make examples" options were used.

This is a partial revert of 709cc880

.

Change-Id: If363cd24d30ba4c102a35ed2617999ae4e9ed9b0
Reviewed-by: Toby Tomkins <toby.tomkins@nokia.com>

qtbase.pro

@@ -25,11 +25,11 @@ contains(PROJECTS, libs) {
 }
 contains(PROJECTS, examples) {
     PROJECTS -= examples
-    !fast:SUBDIRS += examples
+    SUBDIRS += examples
 }
 contains(PROJECTS, tests) {
     PROJECTS -= tests
-    !fast:SUBDIRS += module_qtbase_tests
+    SUBDIRS += module_qtbase_tests
 }
 !isEmpty(PROJECTS) {
     message(Unknown PROJECTS: $$PROJECTS)