libconfig@1.7.3 (#2455)

[dmitry-j-mikhin]

PR for #2455

Release: https://github.com/hyperrealm/libconfig/releases/tag/v1.7.3

Used by:

• https://github.com/kubevirt/kubevirt
• https://github.com/JFreegman/toxic

[bazel-io]

Hello @bazelbuild/bcr-maintainers, modules without existing maintainers (libconfig) have been updated in this PR. Please review the changes.

[meteorcloudy]

Please check the presubmit

[dmitry-j-mikhin]

Thanks, will try to fix

[dmitry-j-mikhin]

@meteorcloudy I added an experimental fix, can't test it now because I don't have access to the Windows VM. But it looks like the additional defines should fix compilation errors on Windows.

[meteorcloudy]

Thanks!