ProcessReader module tests use dl_iterate_phdr to check that the
loader's modules appear in the ProcessReader's module vector, but
this API is not provided on Android for ARM until API 21.
Bug: crashpad:30
Change-Id: I7832bb5560f870671812c42345d4b59bf4416a26
Reviewed-on: https://chromium-review.googlesource.com/871972
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Joshua Peraza <jperaza@chromium.org>