We aren't targeting pure C89 any longer and it also upsets GCC on AArch64 because asm() isn't part of C89. Change-Id: I0ba299160e2f0c40d9a99ea8df13b4bb33c08163 Reviewed-on: https://boringssl-review.googlesource.com/2800 Reviewed-by: Adam Langley <agl@google.com>kris/onging/CECPQ3_patch15