Make glib mandatory and fixup utils appropriately

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/qemu-common.h b/qemu-common.h
index 74d5c4b..c1d4126 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -37,6 +37,7 @@
 #include <sys/time.h>
 #include <assert.h>
 #include <signal.h>
+#include <glib.h>
 
 #ifdef _WIN32
 #include "qemu-os-win32.h"