[gegl/fix-osx-build] Add forgotten defines

[Alex Samorukov <asamorukov src gnome org>]

commit d05eb01170728f45f561ca937708a293e29e02d9
Author: Alex Samorukov <samm net-art cz>
Date:   Mon Apr 8 11:15:49 2019 +0000

    Add forgotten defines

 gegl/gegl-config.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/gegl/gegl-config.c b/gegl/gegl-config.c
index 1fda008c0..9882a0390 100644
--- a/gegl/gegl-config.c
+++ b/gegl/gegl-config.c
@@ -38,6 +38,12 @@
 #include <windows.h>
 #endif
 
+#ifdef __APPLE__
+#include <mach/mach.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#endif
+
 G_DEFINE_TYPE (GeglConfig, gegl_config, G_TYPE_OBJECT)
 
 static GObjectClass * parent_class = NULL;