Masami Hiramatsu 7752f1b096 perf probe: Don't compile CFI related code if elfutils is old
Check elfutils version, and if it is old don't compile CFI analysis code. This
allows to compile perf with old elfutils.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Tested-by: Stephane Eranian <eranian@google.com>
Reported-by: Robert Richter <robert.richter@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <20100510171207.26029.97604.stgit@localhost6.localdomain6>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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