Align all SkRecord::alloc() calls up to at least a pointer size.

src/core/SkRecord.h

Index: src/core/SkRecord.h
diff --git a/src/core/SkRecord.h b/src/core/SkRecord.h
index 96da69b12ef8c150729c07c8e846fab5452cb1dc..203a16c4e872768fbf47f5204f5ebf82e83dc7b7 100644
--- a/src/core/SkRecord.h
+++ b/src/core/SkRecord.h
@@ -65,7 +65,8 @@ public:
     // Here T can be any class, not just those from SkRecords.  Throws on failure.
     template <typename T>
     T* alloc(size_t count = 1) {
-        return (T*)fAlloc.allocThrow(sizeof(T) * count);
+        // Bump up to the next pointer width if needed, so all allocations start pointer-aligned.
+        return (T*)fAlloc.allocThrow(SkAlignPtr(sizeof(T) * count));
     }
 
     // Add a new command of type T to the end of this SkRecord.