-DENABLE_DOWNLOADS=1 -DWITH_PERFORMANCE_SCHEMA=ON results in a test build failure

[laurynas-biveinis]

Adding -DENABLE_DOWNLOADS=1 -DWITH_PERFORMANCE_SCHEMA=ON to cmake option results in

Linking CXX executable merge_small_tests-t
../../mysys/libmysys.a(posix_timers.c.o): In function `start_helper_thread':
/home/laurynas/mysql-server/mysys/posix_timers.c:112: undefined reference to `key_thread_timer_notifier'
collect2: error: ld returned 1 exit status
unittest/gunit/CMakeFiles/merge_small_tests-t.dir/build.make:102: recipe for target 'unittest/gunit/merge_small_tests-t' failed
make[2]: *** [unittest/gunit/merge_small_tests-t] Error 1
CMakeFiles/Makefile2:3892: recipe for target 'unittest/gunit/CMakeFiles/merge_small_tests-t.dir/all' failed
make[1]: *** [unittest/gunit/CMakeFiles/merge_small_tests-t.dir/all] Error 2
Makefile:147: recipe for target 'all' failed
make: *** [all] Error 2