[PATCH] perf test trace_btf_enum: Fix shellcheck warning

[James Clark]

Shellcheck versions < v0.7.2 can't follow this path so add the helper to
fix the following warning:

  In tests/shell/trace_btf_enum.sh line 13:
  . "$(dirname $0)"/lib/probe.sh
  ^--------------------------^ SC1090: Can't follow non-constant source.
  Use a directive to specify location.

Fixes: d66763fed30f ("perf test trace_btf_enum: Add regression test for the BTF augmentation of enums in 'perf trace'")
Signed-off-by: James Clark <james.clark@xxxxxxxxxx>
---
 tools/perf/tests/shell/trace_btf_enum.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/tests/shell/trace_btf_enum.sh b/tools/perf/tests/shell/trace_btf_enum.sh
index 7d407b52bea5..5a3b8a5a9b5c 100755
--- a/tools/perf/tests/shell/trace_btf_enum.sh
+++ b/tools/perf/tests/shell/trace_btf_enum.sh
@@ -10,6 +10,7 @@ non_syscall="timer:hrtimer_init,timer:hrtimer_start"
 
 TESTPROG="perf test -w landlock"
 
+# shellcheck source=lib/probe.sh
 . "$(dirname $0)"/lib/probe.sh
 skip_if_no_perf_trace || exit 2
 
-- 
2.34.1