[PATCH v5] po: Update Sinhala translation.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=47358

Your paranoid android.

=== debian9 (build log) ===

Makefile:922: recipe for target 'version.res' failed
Makefile:8660: recipe for target 'dlls/kernel32' failed
Task: The win32 build failed

=== debian9 (build log) ===

Makefile:911: recipe for target 'version.res' failed
Makefile:8383: recipe for target 'dlls/kernel32' failed
Task: The wow64 build failed