perf bench uprobe: Remove lib64 from libc.so.6 binary path

bpf_program__attach_uprobe_opts will search LD_LIBRARY_PATH and so
specifying `/lib64` is unnecessary and causes failures for libc.so.6
paths like `/lib/x86_64-linux-gnu/libc.so.6`.

Fixes: 7b47623b ("perf bench uprobe trace_printk: Add entry attaching an BPF program that does a trace_printk")
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrei Vagin <avagin@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240406040911.1603801-1-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/bench/uprobe.c

@@ -47,7 +47,7 @@ static const char * const bench_uprobe_usage[] = {
 #define bench_uprobe__attach_uprobe(prog) \
 	skel->links.prog = bpf_program__attach_uprobe_opts(/*prog=*/skel->progs.prog, \
 							   /*pid=*/-1, \
-							   /*binary_path=*/"/lib64/libc.so.6", \
+							   /*binary_path=*/"libc.so.6", \
 							   /*func_offset=*/0, \
 							   /*opts=*/&uprobe_opts); \
 	if (!skel->links.prog) { \