Check for the newer blkid functions without adding blkid to @LIBS@

If we are using the system-provided blkid, check for the newer blkid
functions without adding -lblkid to @LIBS@.  This prevents programs
(like badblocks) which don't use the blkid library getting linked
against it.

Addresses-Debian-Bug: #919958
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2 files changed