Replace NEON assembly memset16 and memset32 with intrinsic versions.

src/opts/SkUtils_opts_arm.cpp

Index: src/opts/SkUtils_opts_arm.cpp
diff --git a/src/opts/SkUtils_opts_arm.cpp b/src/opts/SkUtils_opts_arm.cpp
index b3a652e74535f35fe08c906abdaf12f49b49ff0d..d74471f787b213052b4c00dea6f4bf58b914945c 100644
--- a/src/opts/SkUtils_opts_arm.cpp
+++ b/src/opts/SkUtils_opts_arm.cpp
@@ -8,14 +8,14 @@
 #include "SkUtils.h"
 #include "SkUtilsArm.h"
 
-extern "C" void memset16_neon(uint16_t dst[], uint16_t value, int count);
-extern "C" void memset32_neon(uint32_t dst[], uint32_t value, int count);
+void sk_memset16_neon(uint16_t dst[], uint16_t value, int count);
+void sk_memset32_neon(uint32_t dst[], uint32_t value, int count);
 
 SkMemset16Proc SkMemset16GetPlatformProc() {
 #if SK_ARM_NEON_IS_ALWAYS
-    return memset16_neon;
+    return sk_memset16_neon;
 #elif SK_ARM_NEON_IS_DYNAMIC
-    return sk_cpu_arm_has_neon() ? memset16_neon : nullptr;
+    return sk_cpu_arm_has_neon() ? sk_memset16_neon : nullptr;
 #else
     return nullptr;
 #endif
@@ -23,9 +23,9 @@ SkMemset16Proc SkMemset16GetPlatformProc() {
 
 SkMemset32Proc SkMemset32GetPlatformProc() {
 #if SK_ARM_NEON_IS_ALWAYS
-    return memset32_neon;
+    return sk_memset32_neon;
 #elif SK_ARM_NEON_IS_DYNAMIC
-    return sk_cpu_arm_has_neon() ? memset32_neon : nullptr;
+    return sk_cpu_arm_has_neon() ? sk_memset32_neon : nullptr;
 #else
     return nullptr;
 #endif