Plumb scudo_stack_depot_size to debuggerd_process_info

This is a no-op but will be used in upcoming scudo changes that allow to
change the depot size at process startup time, and as such we will no
longer be able to call __scudo_get_stack_depot_size in debuggerd.

We already did the equivalent change for the ring buffer size in
https://r.android.com/q/topic:%22scudo_ring_buffer_size%22

Bug: 309446692
Change-Id: Icdcf4cd0a3a486d1ea07a8c616cae776730e1047
diff --git a/libc/private/bionic_globals.h b/libc/private/bionic_globals.h
index 15b570d..8ea7d4d 100644
--- a/libc/private/bionic_globals.h
+++ b/libc/private/bionic_globals.h
@@ -130,6 +130,7 @@
   const char* scudo_region_info = nullptr;
   const char* scudo_ring_buffer = nullptr;
   size_t scudo_ring_buffer_size = 0;
+  size_t scudo_stack_depot_size = 0;
 
   HeapTaggingLevel initial_heap_tagging_level = M_HEAP_TAGGING_LEVEL_NONE;
   bool initial_memtag_stack = false;