[PATCH 20/22] tools/perf/tests: Fix the shellcheck wanrings in lib/waiting.sh

[Athira Rajeev]

Running shellcheck in "lib/waiting.sh" generates below
warning:

   In ./tools/perf/tests/shell/lib/waiting.sh line 1:
   # SPDX-License-Identifier: GPL-2.0
   ^-- SC2148 (error): Tips depend on target shell and yours is unknown. Add a shebang or a 'shell' directive.

Fix this by adding shebang in the beginning of the script.

Signed-off-by: Athira Rajeev <atrajeev at linux.vnet.ibm.com>
---
 tools/perf/tests/shell/lib/waiting.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/tests/shell/lib/waiting.sh b/tools/perf/tests/shell/lib/waiting.sh
index e7a39134a68e..bdd5a7c71591 100644
--- a/tools/perf/tests/shell/lib/waiting.sh
+++ b/tools/perf/tests/shell/lib/waiting.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 
 tenths=date\ +%s%1N
-- 
2.39.1