[scudo] Initialize the allocator in setTrackAllocationStacks.

[eugenis]

Summary

If this is called before the malloc call in a thread (or in the whole
program), the lazy initialization of the allocation can overwrite
Options.

compiler-rt/lib/scudo/standalone/combined.h

return Chunk::isValid(Cookie, Ptr, &Header) &&
            Header.State == Chunk::State::Allocated;
   }
 
   bool useMemoryTagging() { return Primary.useMemoryTagging(); }
 
   void disableMemoryTagging() { Primary.disableMemoryTagging(); }
 
   void setTrackAllocationStacks(bool Track) {
+    initThreadMaybe();
     Options.TrackAllocationStacks = Track;
   }
 
   const char *getStackDepotAddress() const {
     return reinterpret_cast<const char *>(&Depot);
   }
 
   const char *getRegionInfoArrayAddress() const {