[d8] Fix the shared-library build

src/utils.cc

Index: src/utils.cc
diff --git a/src/utils.cc b/src/utils.cc
index 16b5b7c61fa41f64b7368956e029eb970a34b293..ef640c3b0e5bc23d94a602b5a6369dbcb4c1464a 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -387,8 +387,8 @@ void MemCopyUint16Uint8Wrapper(uint16_t* dest, const uint8_t* src,
   }
 }
 
-
-MemCopyUint8Function memcopy_uint8_function = &MemCopyUint8Wrapper;
+V8_EXPORT_PRIVATE MemCopyUint8Function memcopy_uint8_function =
+    &MemCopyUint8Wrapper;
 MemCopyUint16Uint8Function memcopy_uint16_uint8_function =
     &MemCopyUint16Uint8Wrapper;
 // Defined in codegen-arm.cc.
@@ -398,7 +398,8 @@ MemCopyUint16Uint8Function CreateMemCopyUint16Uint8Function(
     Isolate* isolate, MemCopyUint16Uint8Function stub);
 
 #elif V8_OS_POSIX && V8_HOST_ARCH_MIPS
-MemCopyUint8Function memcopy_uint8_function = &MemCopyUint8Wrapper;
+V8_EXPORT_PRIVATE MemCopyUint8Function memcopy_uint8_function =
+    &MemCopyUint8Wrapper;
 // Defined in codegen-mips.cc.
 MemCopyUint8Function CreateMemCopyUint8Function(Isolate* isolate,
                                                 MemCopyUint8Function stub);