Add the dl_iterate_phdr function to libdl for arm.

Bug: 8410085

Merge from internal master.

(cherry-picked from cb491bc66dc0abc145930b09086eb9189a30f6c2)

Change-Id: I94ed51bc5d4c626df7552c0e85c31ccee2d6568f
Merge "Add the dl_iterate_phdr function to libdl for arm."
Merge remote-tracking branch 'aosp/master'