libblkid: remove duplicate entries in symbols

libblkid: remove duplicate entries in symbols

The commit a0487b1cb5beffb8f6783476664b01e8833e0ea8 added symbol
dublicates.  The symbols should only be listed in BLKID_1.0 segment.

/usr/bin/ld.gold: warning: using 'BLKID_1.0' as version for 'blkid_probe_all' which is also named in version 'BLKID_2.15' in script
/usr/bin/ld.gold: warning: using 'BLKID_1.0' as version for 'blkid_probe_all_new' which is also named in version 'BLKID_2.15' in script
copying selected object files to avoid basename conflicts...

Signed-off-by: Sami Kerola <kerolasa@iki.fi>