tree ab2c80079045701c95510702548e722289efee8c
parent 5e03104b4455da383a21d3e01b39f0da3402623a
author James Zern <jzern@google.com> 1748556148 -0700
committer James Zern <jzern@google.com> 1748630534 -0700

fix aarch64 compilation w/gcc < 8.5.0

Tested with aarch64-linux-gnu-gcc (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04).

This adds `vld1q_u16_x2` (added in 8.1.0 [1]), and
`vst1q_u16_x2`, `vst1q_u16_x4` (added in 8.5.0 [2]) to mem_neon.h.

[1]: https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/ChangeLog-2017;h=122911df18051992a4e831af8d3d09430dde553a;hb=406c2abec3f998e9064919b22db62f38a7c0e7b9#l90
[2]: https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/ChangeLog;h=b9c7f42907b9546dd53569b67754a23e4b358fdf;hb=eafe83f2f20ef0c1e7703c361ba314b44574523c#l2019

Bug: aomedia:419829066
Change-Id: I26dfedd14883ab87585f57691a6e3c8c64e5f4a9
(cherry picked from commit 146ad35ccc6c3156941e5743c0261811fe59c242)