[msitools] msibuild: add missing include file

[Marc-Andre Lureau <malureau src gnome org>]

commit 8960c77785d24e3cb610f5eb28416945c524eb24
Author: Paolo Bonzini <pbonzini redhat com>
Date:   Thu Jan 17 09:05:16 2013 +0100

    msibuild: add missing include file

 tools/msibuild.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tools/msibuild.c b/tools/msibuild.c
index 140e0a7..d9031c3 100644
--- a/tools/msibuild.c
+++ b/tools/msibuild.c
@@ -21,6 +21,7 @@
 #include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <sys/stat.h>
 #include <libmsi.h>