perf tools: Add an option to build without libbfd

Some distributions, like debian, don't link perf with libbfd. Add a
build flag to make this configuration buildable and testable.

This was inspired by:

Signed-off-by: Ian Rogers <>
Cc: Alexander Shishkin <>
Cc: Jiri Olsa <>
Cc: Mark Rutland <>
Cc: Namhyung Kim <>
Cc: Peter Zijlstra <>
Cc: tony garnock-jones <>
Signed-off-by: Arnaldo Carvalho de Melo <>
1 file changed