linaro_swr: Make it a 64bit only build target am: ab68f0ee84

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/2785579

Change-Id: If9225fa465a08fb28539a78692a355a7b1c1242a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>