[PATCH] perf test trace_btf_general: Fix shellcheck warning

[James Clark]

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

  tests/shell/trace_btf_general.sh line 8:
  . "$(dirname $0)"/lib/probe.sh
  ^--------------------------^ SC1090: Can't follow non-constant source.
  Use a directive to specify location.

Fixes: 0255338d6975 ("perf trace: Add tests for BTF general augmentation")
Signed-off-by: James Clark <james.clark@xxxxxxxxxx>
---
 tools/perf/tests/shell/trace_btf_general.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/tests/shell/trace_btf_general.sh b/tools/perf/tests/shell/trace_btf_general.sh
index 005c93e6c770..e9ee727f3433 100755
--- a/tools/perf/tests/shell/trace_btf_general.sh
+++ b/tools/perf/tests/shell/trace_btf_general.sh
@@ -5,6 +5,7 @@
 err=0
 set -e
 
+# shellcheck source=lib/probe.sh
 . "$(dirname $0)"/lib/probe.sh
 
 file1=$(mktemp /tmp/file1_XXXX)
-- 
2.34.1