Use ARMv8 CRC32 instructions for SkOpts::hash().

src/opts/SkOpts_crc32.cpp

Index: src/opts/SkOpts_crc32.cpp
diff --git a/src/opts/SkOpts_sse42.cpp b/src/opts/SkOpts_crc32.cpp
similarity index 72%
copy from src/opts/SkOpts_sse42.cpp
copy to src/opts/SkOpts_crc32.cpp
index 18831821920cf16e8e3d88e6d90b46756f41dae2..8fc88aa7f560bfbb722132052ddb2dd990e71035 100644
--- a/src/opts/SkOpts_sse42.cpp
+++ b/src/opts/SkOpts_crc32.cpp
@@ -7,12 +7,11 @@
 
 #include "SkOpts.h"
 
-#define SK_OPTS_NS sse42
+#define SK_OPTS_NS crc32
 #include "SkChecksum_opts.h"
 
 namespace SkOpts {
-    void Init_sse42() {
-        hash_fn = sse42::hash_fn;
+    void Init_crc32() {
+        hash_fn = crc32::hash_fn;
     }
 }
-