rubu19: replace bind_stack.patch with upstream patch

ruby19 was updated to replace the bind_stack.patch with upstream patch (bnc#796757)
(thread_pthread.c-ruby_init_stack-ignore-STACK_END_ADDRESS.patch)
* thread_pthread.c (ruby_init_stack): ignore `STACK_END_ADDRESS'
if Ruby interpreter is running on co-routine.

Fixed bugs
bnc#796757
Ruby 1.9.3 segfault when embedding into threaded code
bnc#796757
Ruby 1.9.3 segfault when embedding into threaded code
Selected Binaries
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