Fix MSVC build.

[hvdijk]

In commit 33be1b1, I updated rounding_mode.* to their current OpenCL-CTS versions without noticing that the old versions had an intentional deviation from OpenCL-CTS: a call to vlog_error had been commented out, and the headers that were needed only for that were also left out. This commit reapplies those changes.

[hvdijk]

@bader Testing this on Visual Studio 2022, I could reproduce the error regarding the missing headers and can see rounding_mode.cpp compiles with this change, but I am unable to link test binaries because of other unrelated errors which may be something in my setup. Are you able to test whether MSVC builds actually work properly on setups where they previously worked?

[hvdijk]

The CI shows no error other than "Error: The operation was canceled" after six hours, which I presume is a timeout? Should I do something to get the CI to re-run?

[bader]

The CI shows no error other than "Error: The operation was canceled" after six hours, which I presume is a timeout? Should I do something to get the CI to re-run?

I've updated your branch, which fixed ccache configuration. It should pass now. No actions should be needed from your side.

[bader]

@bader Testing this on Visual Studio 2022, I could reproduce the error regarding the missing headers and can see rounding_mode.cpp compiles with this change, but I am unable to link test binaries because of other unrelated errors which may be something in my setup. Are you able to test whether MSVC builds actually work properly on setups where they previously worked?

@hvdijk, thanks! @jiezzhang confirmed that this patch fixes the problem.