perf tools: Fix perf's libperf_print callback

perf tools: Fix perf's libperf_print callback

[ Upstream commit aeee9dc53ce405d2161f9915f553114e94e5b677 ]

eprintf() does not expect va_list as the type of the 4th parameter.

Use veprintf() because it does.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: 428dab813a56ce94 ("libperf: Merge libperf_set_print() into libperf_init()")
Cc: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20220408132625.2451452-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>