Fixed FTBFS with g++7 caused by #include directive placed inside namespace.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 1a41c9e42a)

mcop_mt/threads_posix.cc

@@ -28,6 +28,7 @@
 #ifdef HAVE_LIBPTHREAD
 
 #include <gsl/gslconfig.h>
+#include <gsl/gslcommon.h>
 
 #include <sys/types.h>
 #include <stddef.h>
@@ -36,7 +37,6 @@
 #include <semaphore.h>
 #include <debug.h>
 #include <string.h>
-
 #include "thread.h"
 
 /*
@@ -332,7 +332,6 @@ public:
 	}
 } initOnStartup;
 
-#include <gsl/gslcommon.h>
 /* -fast- locking for gsl on platforms with unix98 support */
 #if (GSL_HAVE_MUTEXATTR_SETTYPE > 0)
 static void pth_mutex_init (GslMutex *mutex)