Source not available if the path contains unicode char when hit bp

[caslan]

Internal bug id: 196744

Repro:

1. Puting your source code under path like: /home/tester/Documents/test司法

2. Open in VS Code

3. Set some BP

4. F5 tostart debugging

Expected:

VS Code is able to find the place to stop in source code

Actual:

Stopped at a place and show:

Source /home/tester/Documents/test345217270346263225/a.cpp is not available.

Investigation:

There is no such path /home/tester/Documents/test345217270346263225/,

it should be /home/tester/Documents/test司法

Inside of MI mode, GDB sends the actual document using Unicode escapes. For instance in the case I am looking at, the actual returned path is /home/jacdavis/tests\345\217\260\345\214\227/a.out.

That is a gdb bug. We should check and see if we can work around this by translating those back to Unicode, but we may be out of luck here.