btrfs-progs: tests: add sys-array-num-stripes-0.raw.xz

Signed-off-by: David Sterba <dsterba@suse.com>

tests/fuzz-tests/images/sys-array-num-stripes-0.raw.txt

@@ -0,0 +1,30 @@
+URL: http://article.gmane.org/gmane.comp.file-systems.btrfs/50230
+Vegard Nossum, 2015-11-15
+
+If sys_array::num_stripes == 0, we hit a BUG_ON during mount:
+
+BTRFS: device fsid 9006933e-2a9a-44f0-917f-514252aeec2c devid 1 transid 7 /dev/loop0
+BTRFS info (device loop0): disk space caching is enabled
+BUG: failure at fs/btrfs/ctree.h:337/btrfs_chunk_item_size()!
+Kernel panic - not syncing: BUG!
+CPU: 0 PID: 313 Comm: mount Not tainted 4.2.5-00657-ge047887-dirty #25
+Stack:
+ 637af890 60062489 602aeb2e 604192ba
+ 60387961 00000011 637af8a0 6038a835
+ 637af9c0 6038776b 634ef32b 00000000
+Call Trace:
+ [<6001c86d>] show_stack+0xfe/0x15b
+ [<6038a835>] dump_stack+0x2a/0x2c
+ [<6038776b>] panic+0x13e/0x2b3
+ [<6020f099>] btrfs_read_sys_array+0x25d/0x2ff
+ [<601cfbbe>] open_ctree+0x192d/0x27af
+ [<6019c2c1>] btrfs_mount+0x8f5/0xb9a
+ [<600bc9a7>] mount_fs+0x11/0xf3
+ [<600d5167>] vfs_kern_mount+0x75/0x11a
+ [<6019bcb0>] btrfs_mount+0x2e4/0xb9a
+ [<600bc9a7>] mount_fs+0x11/0xf3
+ [<600d5167>] vfs_kern_mount+0x75/0x11a
+ [<600d710b>] do_mount+0xa35/0xbc9
+ [<600d7557>] SyS_mount+0x95/0xc8
+
+Fixed by patch (kernel and btrfs-progs): btrfs: handle invalid num_stripes in sys_array