databases/rocksdb: Fix build on i386

Reference:	https://pkg-status.freebsd.org/beefy21/data/140i386-default/02faf78f4c9b/logs/rocksdb-9.2.1.log

databases/rocksdb/files/patch-i386

@@ -0,0 +1,11 @@
+--- db_stress_tool/db_stress_common.cc.orig	2024-05-08 23:03:15 UTC
++++ db_stress_tool/db_stress_common.cc
+@@ -200,7 +200,7 @@ void CompressedCacheSetCapacityThread(void* v) {
+         // Lower by upto 50% of usable block cache capacity
+         adjustment = (adjustment * thread->rand.Uniform(50)) / 100;
+         block_cache->SetCapacity(capacity - adjustment);
+-        fprintf(stdout, "New cache capacity = %lu\n",
++        fprintf(stdout, "New cache capacity = %zu\n",
+                 block_cache->GetCapacity());
+         db_stress_env->SleepForMicroseconds(10 * 1000 * 1000);
+         block_cache->SetCapacity(capacity);