Merge "Add <dlfcn.h> to the libdl documentation." into main am: 502fb8c12d

Original change: https://android-review.googlesource.com/c/platform/bionic/+/3365477

Change-Id: I6971cfe813b8639e8bc1a03effb750e003e31ca4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>