Add explicit targets to Reflection tests due to chained fixups issue
When the deployment target is newer than swift-5.4 these tests fail due
to missing/incomplete support for chained fixups.
rdar://134809489
(cherry picked from commit 5d111db75a08b8bf334dcd250aabe1c048e372f3)
(cherry picked from commit 90e3f12e27e048834271efe821c964ede998c426)