[evolution-data-server] Fix implicit declaration of WIFEXITED.

[Antoine Jacoutot <ajacoutot src gnome org>]

commit 7de39a7e16ab1f71d67a27dcb5bf3e0b29976757
Author: Antoine Jacoutot <ajacoutot gnome org>
Date:   Fri Mar 29 15:54:07 2013 +0100

    Fix implicit declaration of WIFEXITED.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=696858

 tests/test-server-utils/e-test-server-utils.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/tests/test-server-utils/e-test-server-utils.c b/tests/test-server-utils/e-test-server-utils.c
index 32f3c88..2f93c22 100644
--- a/tests/test-server-utils/e-test-server-utils.c
+++ b/tests/test-server-utils/e-test-server-utils.c
@@ -22,6 +22,8 @@
 
 #include "e-test-server-utils.h"
 
+#include <sys/wait.h>
+
 #define ADDRESS_BOOK_SOURCE_UID "test-address-book"
 #define CALENDAR_SOURCE_UID     "test-calendar"