Added missing file to free branch

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@5945 383ad7c9-94d9-4d36-a494-682f7c89f535

OpenFlipper.cmake

+# add our macro directory to cmake search path
+set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/OpenFlipper/cmake)
+
+include (common)