[sysprof] tests: add missing locale.h include

[Christian Hergert <chergert src gnome org>]

commit 1017fed4679c7dd13d03e712dc6a19f1fb4ffe84
Author: Christian Hergert <chergert redhat com>
Date:   Thu Feb 20 10:59:57 2020 -0800

    tests: add missing locale.h include

 src/tests/allocs-by-size.c     | 1 +
 src/tests/memory-stack-stash.c | 1 +
 2 files changed, 2 insertions(+)
---
diff --git a/src/tests/allocs-by-size.c b/src/tests/allocs-by-size.c
index f0d3f24..666113a 100644
--- a/src/tests/allocs-by-size.c
+++ b/src/tests/allocs-by-size.c
@@ -21,6 +21,7 @@
 #include "config.h"
 
 #include <glib/gi18n.h>
+#include <locale.h>
 #include <stddef.h>
 #include <rax.h>
 #include <sysprof.h>
diff --git a/src/tests/memory-stack-stash.c b/src/tests/memory-stack-stash.c
index 9d6859d..7b6675c 100644
--- a/src/tests/memory-stack-stash.c
+++ b/src/tests/memory-stack-stash.c
@@ -21,6 +21,7 @@
 #include "config.h"
 
 #include <glib/gi18n.h>
+#include <locale.h>
 #include <stddef.h>
 #include <rax.h>
 #include <sysprof.h>