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: I41253e8e8d0e9932e5de4deb1b5e2ee08c8ef144
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>