undo bizarre build order fiddling

libs/utils does not depend on app_version.h any more.

This reverts commit 7378ce32.

Change-Id: Ib4a60a6587d93952b15228793320d8dd99e2d475
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>

src/libs/libs.pro

 TEMPLATE  = subdirs
 CONFIG   += ordered
 
-# aggregation and extensionsystem are directly in src.pro
-# because of dependencies of app
 SUBDIRS   = \
+    aggregation \
+    extensionsystem \
     utils \
     utils/process_stub.pro \
     languageutils \

src/src.pro

@@ -2,9 +2,7 @@ TEMPLATE  = subdirs
 CONFIG   += ordered
 
 SUBDIRS = \
-    libs/aggregation \ # needed by extensionsystem
-    libs/extensionsystem \ # needed by app
-    app \ # needed by libs/utils for app_version.h
     libs \
+    app \
     plugins \
     tools