[RFC][testsuite] Add option to link testcases with pthreads when using 'prepare_for_testing'

[Tom Tromey]

>>>>> "Siva" == Siva Chandra <sivachandra@google.com> writes:

Siva> 2013-04-15  Siva Chandra Reddy  <sivachandra@google.com>
Siva>         Add option to link testcases with Pthreads library when
Siva>         using 'prepare_for_testing' in tests.

Siva>         testsuite/
Siva>         * lib/gdb.exp (build_executable_from_specs): Use
Siva>         gdb_compile_pthreads to compile if option "pthreads" is
Siva>         specified.

This is ok, thanks.

Tom