BUG: fix 4164, also search for libruby1.8.so, I guess it should be synced

with the KDE version of FindRUBY.cmake

Alex

Modules/FindRuby.cmake

@@ -46,7 +46,7 @@ FIND_PATH(RUBY_INCLUDE_PATH
   /usr/lib/ruby/1.8/i586-linux-gnu/ )
 
 FIND_LIBRARY(RUBY_LIBRARY
-  NAMES ruby
+  NAMES ruby ruby1.8
   PATHS ${RUBY_POSSIBLE_LIB_PATH}
   )