Bail for SIMD code in LSE.

Rationale:
LSE does not look at vector load/stores currently,
which potentially breaks anything containing SIMD.
This is a temporary fix to get the mainline clean
until the real solution (looking at simd l/s) goes in.

Test: test-art-host test-art-target

Bug: 64091002
Change-Id: I018685bcd32ab8e0710435bf1d1d95aafd874a33