build: Add V8_EXPORT_PRIVATE to PushPopQueue

Fixes a link error for Windows on Arm component builds.

Change-Id: I848c3aac710b6cbb099011d9c56d7cbc8b5b97fc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1611683Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61502}

src/arm64/macro-assembler-arm64.h

@@ -1590,7 +1590,7 @@ class V8_EXPORT_PRIVATE MacroAssembler : public TurboAssembler {
   //
   // Unlike the other Push and Pop macros, PushPopQueue can handle mixed sets of
   // register sizes and types.
-  class PushPopQueue {
+  class V8_EXPORT_PRIVATE PushPopQueue {
    public:
     explicit PushPopQueue(MacroAssembler* masm) : masm_(masm), size_(0) {}