[Qt] Fix the TestWebKitAPI build
https://bugs.webkit.org/show_bug.cgi?id=113044

Reviewed by Tor Arne Vestbø.

The generate-forwarding-headers script would only be run
after the targets in InjectedBundle.pri since the second
addStrictSubdirOrderBetween call in
Tools/TestWebKitAPI/TestWebKitAPI.pro would overwrite
the derived_sources -> injected_bundle order in SUBDIRS.

Fix it by only moving the dependent target at the end of
SUBDIRS, don't touch its dependency.

* qmake/mkspecs/features/functions.prf:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146593 268f45cc-cd09-0410-ab3c-d52691b4dbfc