[gobject-introspection] girepository: Add missing include

[Colin Walters <walters src gnome org>]

commit b503f31c7cfa3329456de9bff5a2c816a607285e
Author: Colin Walters <walters verbum org>
Date:   Sat Sep 26 11:51:33 2015 -0400

    girepository: Add missing include
    
    For previous commit.

 girepository/girepository.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/girepository/girepository.c b/girepository/girepository.c
index 97074a8..bb91977 100644
--- a/girepository/girepository.c
+++ b/girepository/girepository.c
@@ -28,6 +28,7 @@
 #include <stdlib.h>
 
 #ifdef HAVE_GETAUXVAL
+#include <unistd.h>
 #include <sys/auxv.h>
 #endif