xfsprogs: explicitly cast troublesome types to match printf format specifiers

xfsprogs: explicitly cast troublesome types to match printf  format specifiers

Certain system-defined types (__u64, __s64, __nlink_t, __ino64_t,
__off64_t, __blkcnt64_t) don't have a consistent definition across
different architectures, so wherever we use a printf format specifier on
such a variable, we have to typecast the variable or else the compiler
will complain.

IOWs this fixes build warnings on ppc64le.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>