This is a workaround for bug #371396. It adds a new test program
that can be used skip tests given a specific libc implementation
and optionally a specific minimum version. Currently only glibc
is recognized. This is used for the drd and helgrind tests
pth_cond_destroy_busy to be skipped on glibc 2.24.90+.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@16097