[scudo] Fix definition of canCache() function

[ddcc]

Summary

The called member function has boolean type, change this function to match

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

template <typename F> void iterateOverBlocks(F Callback) const {
     for (const auto &H : InUseBlocks) {
       uptr Ptr = reinterpret_cast<uptr>(&H) + LargeBlock::getHeaderSize();
       if (allocatorSupportsMemoryTagging<Config>())
         Ptr = untagPointer(Ptr);
       Callback(Ptr);
     }
   }
 
-  uptr canCache(uptr Size) { return Cache.canCache(Size); }
+  bool canCache(uptr Size) { return Cache.canCache(Size); }
 
   bool setOption(Option O, sptr Value) { return Cache.setOption(O, Value); }
 
   void releaseToOS() { Cache.releaseToOS(); }
 
   void disableMemoryTagging() { Cache.disableMemoryTagging(); }
 
   void unmapTestOnly() { Cache.unmapTestOnly(); }