[sfi] Use aligned size for SFI

The BodyDescriptor of an object should use its aligned size.

Change-Id: If743ca130b3cb97c4f25054db6dc887d88fc5e32
Reviewed-on: https://chromium-review.googlesource.com/1140309Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54510}

src/objects/shared-function-info.h

@@ -603,7 +603,7 @@ class SharedFunctionInfo : public HeapObject, public NeverReadOnlySpaceObject {
   static const int kAlignedSize = POINTER_SIZE_ALIGN(kSize);
 
   typedef FixedBodyDescriptor<kStartOfPointerFieldsOffset,
-                              kEndOfPointerFieldsOffset, kSize>
+                              kEndOfPointerFieldsOffset, kAlignedSize>
       BodyDescriptor;
   // No weak fields.
   typedef BodyDescriptor BodyDescriptorWeak;