placement new requires operator new (size_t, void*) to be defined, which requires pulling in the <new> header. Change-Id: Ibaa8f3309b03129958f201d32de8afcfafed70f6 Reviewed-on: https://boringssl-review.googlesource.com/18664 Reviewed-by: David Benjamin <davidben@google.com>kris/onging/CECPQ3_patch15