Added fix for ARM32 build

Makefile

@@ -35,6 +35,7 @@ all: ceph-config
 	patch -Np1 -d ceph-15.2.4 < ceph-15.2.4-fix_tests.patch
 	patch -Np1 -d ceph-15.2.4 < ceph-15.2.4-fix_ceph-volume_systemd_unit.patch
 	patch -Np1 -d ceph-15.2.4 < ceph-15.2.4-no_git.patch
+	patch -Np1 -d ceph-15.2.4 < ceph-15.2.4-arm32_fix.patch
 	cd ceph-15.2.4 && ./do_cmake.sh -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_INSTALL_SYSCONFDIR=/etc -DCMAKE_INSTALL_LIBEXECDIR=/lib -DWITH_SPDK=OFF -DWITH_RDMA=OFF -DWITH_RADOSGW_AMQP_ENDPOINT=OFF -DWITH_PYTHON2=OFF -DWITH_PYTHON3=ON
 	$(MAKE) -C ceph-15.2.4/build npm_config_cache=/build/.npm NODE_OPTIONS="--max-old-space-size=4096"
 	hostname localhost

ceph-15.2.4-arm32_fix.patch

+diff -uNr ceph-15.2.4/src/mds/PurgeQueue.h ceph-15.2.4-arm32_fix/src/mds/PurgeQueue.h
+--- ceph-15.2.4/src/mds/PurgeQueue.h	2020-07-01 01:10:51.000000000 +0930
++++ ceph-15.2.4-arm32_fix/src/mds/PurgeQueue.h	2020-08-27 00:15:06.605014878 +0930
+@@ -219,6 +219,6 @@
+   size_t purge_item_journal_size;
+ 
+   uint64_t ops_high_water = 0;
+-  uint64_t files_high_water = 0;
++  size_t files_high_water = 0;
+ };
+ #endif