Support xxhash 32-bit checksums (data_csum_type=xxh3_32)

src/test/CMakeLists.txt

@@ -41,6 +41,7 @@ add_executable(test_heap
 	../blockstore/multilist.cpp
 	../blockstore/blockstore_heap.cpp
 	../util/crc32c.c
+	../util/xxhash.c
 	../util/allocator.cpp
 	../blockstore/blockstore_disk.cpp
 	../util/str_util.cpp

src/test/test_heap.cpp

@@ -1117,7 +1117,7 @@ void test_corruption()
         blockstore_heap_t heap(&dsk, buffer_area.data());
         auto entry = ((heap_entry_t*)tmp.data());
         entry->size++;
-        entry->crc32c = entry->calc_crc32c();
+        entry->checksum = entry->calc_checksum(&heap);
         uint64_t entries_loaded;
         assert(heap.load_blocks(0, dsk.meta_block_size, tmp.data(), false, entries_loaded) == EDOM);
     }