perf test: Rename builtin-test-list and add missed header guard

builtin-test-list is primarily concerned with shell script
tests. Rename the file to better reflect this and add a missed header
guard.

Signed-off-by: Ian Rogers <[e-mail]>
Cc: James Clark <[e-mail]>
Cc: Justin Stitt <[e-mail]>
Cc: Bill Wendling <[e-mail]>
Cc: Nick Desaulniers <[e-mail]>
Cc: Yang Jihong <[e-mail]>
Cc: Nathan Chancellor <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Athira Jajeev <[e-mail]>
Cc: [e-mail]
Signed-off-by: Namhyung Kim <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

tools/perf/tests/Build

···
 # SPDX-License-Identifier: GPL-2.0
 
 perf-y += builtin-test.o
-perf-y += builtin-test-list.o
+perf-y += tests-scripts.o
 perf-y += parse-events.o
 perf-y += dso-data.o
 perf-y += attr.o

tools/perf/tests/builtin-test-list.c tools/perf/tests/tests-scripts.c

···
 #include <sys/wait.h>
 #include <sys/stat.h>
 #include "builtin.h"
-#include "builtin-test-list.h"
+#include "tests-scripts.h"
 #include "color.h"
 #include "debug.h"
 #include "hist.h"

tools/perf/tests/builtin-test-list.h tools/perf/tests/tests-scripts.h

···
 /* SPDX-License-Identifier: GPL-2.0 */
+#ifndef TESTS_SCRIPTS_H
+#define TESTS_SCRIPTS_H
 
 struct script_file {
 	char *dir;
···
 const struct script_file *list_script_files(void);
 /* Get maximum width of description string */
 int list_script_max_width(void);
+
+#endif /* TESTS_SCRIPTS_H */

tools/perf/tests/builtin-test.c

···
 #include <subcmd/exec-cmd.h>
 #include <linux/zalloc.h>
 
-#include "builtin-test-list.h"
+#include "tests-scripts.h"
 
 static bool dont_fork;
 const char *dso_to_test;