[lit, lldbmi] Skip the new break-insert test on Windows

Summary: Skip the new break-insert test on Windows because it hangs and so the test suite never completes. All other lldb-mi tests in the test suite are also skipped on windows

Reviewers: asmith, aprantl, polyakov.alex

Reviewed By: aprantl

Subscribers: ki.stfu, llvm-commits

Differential Revision: https://reviews.llvm.org/D47651

llvm-svn: 333789