cwidget: apply ftbfs patch to build aptitude i386

helpers/DATA/cwidget/0002-Fix-cwidget-and-aptitude-FTBFS.patch

@@ -0,0 +1,16 @@
+Description: Fix FTBFS in cwidget as well as in aptitude due to missing #include <pthread.h>
+Author: Paul Wise <pabs@debian.org>
+Reviewed-By: Axel Beckert <abe@debian.org>
+Bug-Debian: https://bugs.debian.org/1015925
+Bug: https://bugs.debian.org/1015925
+
+--- a/src/cwidget/generic/threads/threads.h
++++ b/src/cwidget/generic/threads/threads.h
+@@ -26,6 +26,7 @@
+ #define THREADS_H
+ 
+ #include <errno.h>
++#include <pthread.h>
+ #include <cwidget/generic/util/exception.h>
+ 
+ namespace cwidget