Adjust gdb.base/bp-permanent.exp for Cygwin On Cygwin, all inferiors are multi-threaded, because both Windows and the Cygwin runtime spawn a few helper threads. Adjust the gdb.base/bp-permanent.exp testcase to work with either single- or multi-threaded inferiors. Approved-by: Kevin Buettner <kevinb@redhat.com> Change-Id: I28935b34fc9f739c2a5490e83aa4995d29927be2