blkid: new applet. We almost had everything needed for it already

blkid: new applet. We almost had everything needed for it already

function                                             old     new   delta
display_uuid_cache                                     -      89     +89
blkid_main                                             -       8      +8
applet_names                                        1871    1877      +6
applet_main                                         1140    1144      +4
applet_nameofs                                       570     572      +2
packed_usage                                       24737   24735      -2
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(add/remove: 2/0 grow/shrink: 3/1 up/down: 109/-2)            Total: 107 bytes