databases/rocksdb: Fix build on aarch64

util/crc32c_arm64.cc:60:16: error: use of undeclared identifier 'AT_HWCAP'
  elf_aux_info(AT_HWCAP, &auxv, sizeof(auxv));
               ^
util/crc32c_arm64.cc:89:16: error: use of undeclared identifier 'AT_HWCAP'
  elf_aux_info(AT_HWCAP, &auxv, sizeof(auxv));
               ^
2 errors generated.

Reference:	https://pkg-status.freebsd.org/ampere3/data/132arm64-default/1e21f425f6c4/logs/rocksdb-8.11.3.log
Tested on:	ref14-aarch64

databases/rocksdb/files/patch-aarch64

@@ -1,14 +1,11 @@
---- CMakeLists.txt.orig	2021-06-25 21:15:04 UTC
-+++ CMakeLists.txt
-@@ -612,6 +612,11 @@ if(HAVE_AUXV_GETAUXVAL)
-   add_definitions(-DROCKSDB_AUXV_GETAUXVAL_PRESENT)
- endif()
- 
-+check_cxx_symbol_exists(elf_aux_info sys/auxv.h HAVE_ELF_AUX_INFO)
-+if(HAVE_ELF_AUX_INFO)
-+  add_definitions(-DROCKSDB_AUXV_GETAUXVAL_PRESENT)
-+endif()
-+
- include_directories(${PROJECT_SOURCE_DIR})
- include_directories(${PROJECT_SOURCE_DIR}/include)
- if(WITH_FOLLY_DISTRIBUTED_MUTEX)
+--- util/crc32c_arm64.cc.orig	2024-02-28 00:24:11 UTC
++++ util/crc32c_arm64.cc
+@@ -10,7 +10,7 @@
+ #if defined(__linux__)
+ #include <asm/hwcap.h>
+ #endif
+-#ifdef ROCKSDB_AUXV_GETAUXVAL_PRESENT
++#if defined(ROCKSDB_AUXV_GETAUXVAL_PRESENT) || defined(__FreeBSD__)
+ #include <sys/auxv.h>
+ #endif
+ #ifndef HWCAP_CRC32