Mangle asm label correctly for Windows ARM64

Same as Windows x64, Windows ARM64 doesn't prefix assembly label with _.


Bug: chromium:893460
Change-Id: I1b19a4e7ea16da3fe8bd1873509fffe3d067613a
Reviewed-on: https://chromium-review.googlesource.com/c/1298376
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57374}

src/snapshot/macros.h

@@ -20,7 +20,7 @@
 #define V8_ASM_MANGLE_LABEL ""
 #define V8_ASM_DECLARE(NAME) ".globl " V8_ASM_MANGLE_LABEL NAME "\n"
 #elif defined(V8_OS_WIN)  // WIN
-#if defined(V8_TARGET_ARCH_X64)
+#if defined(V8_TARGET_ARCH_X64) || defined(V8_TARGET_ARCH_ARM64)
 #define V8_ASM_MANGLE_LABEL ""
 #else
 #define V8_ASM_MANGLE_LABEL "_"