[sysprof] libsysprof-capture: use sysconf() instead of getpagesize()

[Christian Hergert <chergert src gnome org>]

commit 19e077736be5722955a30de4d2fe014f3d69802a
Author: Christian Hergert <chergert redhat com>
Date:   Thu Feb 13 14:29:35 2020 -0800

    libsysprof-capture: use sysconf() instead of getpagesize()

 src/libsysprof-capture/sysprof-capture-util.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/libsysprof-capture/sysprof-capture-util.c b/src/libsysprof-capture/sysprof-capture-util.c
index cf81c49..58336e7 100644
--- a/src/libsysprof-capture/sysprof-capture-util.c
+++ b/src/libsysprof-capture/sysprof-capture-util.c
@@ -60,6 +60,7 @@
 
 #include <errno.h>
 #include <glib.h>
+#include <unistd.h>
 
 #ifdef G_OS_WIN32
 # include <process.h>
@@ -85,7 +86,7 @@ size_t
       GetSystemInfo (&system_info);
       pgsz = system_info.dwPageSize;
 #else
-      pgsz = getpagesize ();
+      pgsz = sysconf (_SC_PAGESIZE);
 #endif
     }