Reset Boost_NO_BOOST_CMAKE when we're done

Dependent modules shall set it if they need it.

KF5AkonadiConfig.cmake.in

@@ -32,6 +32,8 @@ endif()
 
 set(Boost_NO_BOOST_CMAKE ON)
 find_dependency(Boost "@Boost_MINIMUM_VERSION@")
+# Reset Boost_NO_BOOST_CMAKE now that we found what we need
+unset(Boost_NO_BOOST_CMAKE)
 
 include(${CMAKE_CURRENT_LIST_DIR}/KF5AkonadiTargets.cmake)
 include(${CMAKE_CURRENT_LIST_DIR}/KF5AkonadiMacros.cmake)