e2fsck: fix printf conversion specs in ea_refcount.c

e2fsck: fix printf conversion specs in ea_refcount.c

Commit 130e961a6fb9d38997c83c6397cf9ddb5ed2491f changed the type
used to represent block numbers in ea_refcount.c from blk_t to blk64_t
to add support for 64 bit extended attribute refcounting.  We also
need to adjust printf conversion specs that now don't match their new
blk64_t arguments.  This will silence compiler warnings seen when
"make check" is run and will avoid truncation of printed values.

Signed-off-by: Eric Whitney <enwlinux@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>