Readded missing qmake.cache file

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@27 fdac6126-5c0c-442c-9429-916003d36597

.qmake.cache

+unix {
+	TOPDIR = $$system( pwd )/../
+}
+
+win32 {
+	TOPDIR = $$system( cd )/../
+}
+
+#use next qmake.cache if it exists
+exists(../.qmake.cache) {
+	include( ../.qmake.cache )
+}
+
+include( qmake/all.include )
+