Support building host/vendor variants for tflite. am: f4b3397af2 am: be121f1b51 am: cedb0e1af3

Original change: https://android-review.googlesource.com/c/platform/external/gemmlowp/+/1564337

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4f05260055f188ef1a6dc1a64691661fd1e5867e