[Bug d/89432] FAIL: libphobos.unittests/druntime/{static,shared}/core.time on CentOS 5.11, Linux 2.6.18

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89432

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
The original makefile set the variable with:

  ifeq ($(OS),linux)
    old_kernel:=$(shell [ "$$(uname -r | cut -d'-' -f1)" \< "2.6.39" ] && echo
1)
    ifeq ($(old_kernel),1)
      UDFLAGS+=-version=Linux_Pre_2639
    endif
  endif