File boost-signals.patch of Package traingame

diff -Nur traingame/CMakeLists.txt traingame-patched/CMakeLists.txt
--- traingame/CMakeLists.txt	2016-05-24 11:33:00.055539082 +0200
+++ traingame-patched/CMakeLists.txt	2019-08-24 15:01:16.582906821 +0200
@@ -38,7 +38,7 @@
 find_package (OpenGL REQUIRED)
 find_package (GLEW REQUIRED)
 find_package (Boost 1.37 REQUIRED 
-  COMPONENTS filesystem signals program_options system) 
+  COMPONENTS filesystem program_options system) 
 find_package (Freetype REQUIRED)
 
 if (NOT WIN32)