Add missing string.h include in //courgette/memory_allocator.h The code in this file uses memcpy but fails to include string.h. This lead to a build failure on Linux systems using glibc 2.30, or newer. Bug: 1074286 Change-Id: I09011564cca79cb2cd07a26b3ba77308e79abd8b Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2167856 Reviewed-by: Samuel Huang <huangs@chromium.org> Commit-Queue: Piotr Tworek <ptworek@vewd.com> Cr-Original-Commit-Position: refs/heads/master@{#763240} Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src Cr-Mirrored-Commit: afba0d79e4d498a50ada602193eeb43b51decb66