add test 202, xfs_repair handling of single-AG filesystems

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>

202.out

@@ -0,0 +1,31 @@
+QA output created by 202
+== Creating single-AG filesystem ==
+== Trying to repair it (should fail) ==
+Phase 1 - find and verify superblock...
+Only one AG detected - cannot validate filesystem geometry.
+Use the -o force_geometry option to proceed.
+== Trying to repair it with -o force_geometry ==
+Phase 1 - find and verify superblock...
+Phase 2 - using internal log
+        - zero log...
+        - scan filesystem freespace and inode maps...
+        - found root inode chunk
+Phase 3 - for each AG...
+        - scan and clear agi unlinked lists...
+        - process known inodes and perform inode discovery...
+        - agno = 0
+        - process newly discovered inodes...
+Phase 4 - check for duplicate blocks...
+        - setting up duplicate extent list...
+        - check for inodes claiming duplicate blocks...
+        - agno = 0
+Phase 5 - rebuild AG headers and trees...
+        - reset superblock...
+Phase 6 - check inode connectivity...
+        - resetting contents of realtime bitmap and summary inodes
+        - traversing filesystem ...
+        - traversal finished ...
+        - moving disconnected inodes to lost+found ...
+Phase 7 - verify and correct link counts...
+done
+*** done