gnuchess: add patch for 'pthread_cancel()'

packages/gnuchess/components.cc.patch

@@ -0,0 +1,11 @@
+diff -uNr gnuchess-6.2.5/src/components.cc gnuchess-6.2.5.mod/src/components.cc
+--- gnuchess-6.2.5/src/components.cc	2017-06-11 18:17:14.000000000 +0300
++++ gnuchess-6.2.5.mod/src/components.cc	2018-11-09 14:17:10.952608702 +0200
+@@ -171,6 +171,6 @@
+ 
+ void TerminateInput()
+ {
+-  pthread_cancel( input_thread );
++  pthread_kill( input_thread, 0 );
+   pthread_join( input_thread, NULL );
+ }