tests: add two more tests of orphaned inode handling

Add two tests, f_orphan_indirect_inode, and f_orphan_extents_inode,
which tests the bug fixes in the two previous commits:

e2fsck: update global free blocks/inodes count when truncating orphan inodes
libext2fs: fix block iterator for extents when truncating inodes

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
9 files changed