[tip:perf/core] tools build feature tests: Add missing SPDX headers

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  5e2156d837e875c0277bbe9c5cd965ff56539e0b
Gitweb:     https://git.kernel.org/tip/5e2156d837e875c0277bbe9c5cd965ff56539e0b
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Thu, 13 Jun 2019 18:25:04 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 17 Jun 2019 15:57:19 -0300

tools build feature tests: Add missing SPDX headers

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-3h6fa866w6ao0wsbyqz9nrm8@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/build/feature/test-fortify-source.c | 1 +
 tools/build/feature/test-hello.c          | 1 +
 tools/build/feature/test-setns.c          | 1 +
 3 files changed, 3 insertions(+)

diff --git a/tools/build/feature/test-fortify-source.c b/tools/build/feature/test-fortify-source.c
index c9f398d87868..c8a57194f9f2 100644
--- a/tools/build/feature/test-fortify-source.c
+++ b/tools/build/feature/test-fortify-source.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 
 int main(void)
diff --git a/tools/build/feature/test-hello.c b/tools/build/feature/test-hello.c
index c9f398d87868..c8a57194f9f2 100644
--- a/tools/build/feature/test-hello.c
+++ b/tools/build/feature/test-hello.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 
 int main(void)
diff --git a/tools/build/feature/test-setns.c b/tools/build/feature/test-setns.c
index 4a1581ae7a55..2757c201ed50 100644
--- a/tools/build/feature/test-setns.c
+++ b/tools/build/feature/test-setns.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #define _GNU_SOURCE
 #include <sched.h>