Breakpad: temporarily XFAIL line-table tests

The tests are failing on windows because the paths in the symbol file
are parsed using the host path style. I'm working on a patch to have
SymbolFileBreakpad auto-detect the correct path style (similar to dwarf
r351328).

I originally wanted to make this a part of the initial line-table patch,
but then I simply forgot.

llvm-svn: 353410