perf buildid-cache: Fix symbolic link handling
This was broken since link(2) doesn't dereference symbolic links. Instead 'filename' becomes a symbolic link to the same file that 'name' refers to. This had the bad effect to create dangling symlinks in the case that even can't be removed with perf-buildid-cache(1). LKML-Reference: <m38vzxxrql.fsf@gmail.com> Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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