Add missing <stdarg.h> include
  
  This is needed to fix the build on uClibc, due to the usage of
  va_list.
  
  Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  Index: b/cil/src/cil_log.h
  ===================================================================
  --- a/cil/src/cil_log.h
  +++ b/cil/src/cil_log.h
  @@ -30,6 +30,7 @@
   #define CIL_LOG_H_
   
   #include <stdlib.h>
  +#include <stdarg.h>
   #include <cil/cil.h>
   
   #define MAX_LOG_SIZE 512