another memcpy -> sk_careful_memcpy
another memcpy -> sk_careful_memcpy

https://uberchromegw.corp.google.com/i/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-ASAN/builds/3791/steps/dm/logs/stdio

This is getting tedious.

TBR=herb@google.com,reed@google.com
No API changes.

BUG=skia:

Review URL: https://codereview.chromium.org/1510223003

google/skia,google/skia,qrealka/skia-hc,rubenvb/skia,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,qrealka/skia-hc,rubenvb/skia,aosp-mirror/platform_external_skia,google/skia,Hikari-no-Tenshi/android_external_skia,HalCanary/skia-hc,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,google/skia,rubenvb/skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,rubenvb/skia,HalCanary/skia-hc,HalCanary/skia-hc,rubenvb/skia,qrealka/skia-hc,Hikari-no-Tenshi/android_external_skia,tmpvar/skia.cc,rubenvb/skia,google/skia,HalCanary/skia-hc,HalCanary/skia-hc,Hikari-no-Tenshi/android_external_skia,google/skia,rubenvb/skia,HalCanary/skia-hc,google/skia,tmpvar/skia.cc,HalCanary/skia-hc,rubenvb/skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,tmpvar/skia.cc,qrealka/skia-hc,qrealka/skia-hc,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,google/skia,tmpvar/skia.cc,google/skia,Hikari-no-Tenshi/android_external_skia,tmpvar/skia.cc,google/skia,tmpvar/skia.cc,rubenvb/skia,Hikari-no-Tenshi/android_external_skia,qrealka/skia-hc,tmpvar/skia.cc,qrealka/skia-hc,tmpvar/skia.cc,tmpvar/skia.cc,aosp-mirror/platform_external_skia,qrealka/skia-hc