Merge "Clarify the <sys/ifunc.h> docs." into main am: 6a6f527dfc

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2651113

Change-Id: Ib32f4a7d6e144c4839ab4dc73a34ceac8af28366
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>