[PATCH] perf build: Specify that spellcheck should use the bash dialect.

[Collin Funk <collin.funk1@gmail.com>]

When someone has a global shellcheckrc file, for example at
~/.config/shellcheckrc, with the directive 'shell=sh', building perf
will fail with many shellcheck errors like:

    In tests/shell/base_probe/test_adding_kernel.sh line 294:
    (( TEST_RESULT += $? ))
    ^---------------------^ SC3006 (warning): In POSIX sh, standalone ((..)) is undefined.

    For more information:
      https://www.shellcheck.net/wiki/SC3006 -- In POSIX sh, standalone ((..)) is...
    make[5]: *** [tests/Build:91: tests/shell/base_probe/test_adding_kernel.sh.shellcheck_log] Error 1

Passing the '-s bash' option ensures that it runs correctly regardless
of a developers global configuration.

Signed-off-by: Collin Funk <collin.funk1@gmail.com>
---
 tools/perf/tests/Build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 2181f5a92148..26efc5d20f6c 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -89,7 +89,7 @@ endif
 
 $(OUTPUT)%.shellcheck_log: %
 	$(call rule_mkdir)
-	$(Q)$(call echo-cmd,test)shellcheck -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
+	$(Q)$(call echo-cmd,test)shellcheck -s bash -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-test-y += $(SHELL_TEST_LOGS)
 
-- 
2.49.0