[C++] Custom user flags to archiver call

[Fil-Den]

Description of the feature request:

I want to use the C++ toolchain and have the ability to pass custom flags to the archiving action.

For now it may be only fixed flags: https://github.com/bazelbuild/bazel/blob/master/tools/cpp/windows_cc_toolchain_config.bzl#L507

Which category does this issue belong to?

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What underlying problem are you trying to solve with this feature?

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Which operating system are you running Bazel on?

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What is the output of bazel info release?

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If bazel info release returns development version or (@non-git), tell us how you built Bazel.

No response

What's the output of git remote get-url origin; git rev-parse HEAD ?

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Have you found anything relevant by searching the web?

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Any other information, logs, or outputs that you want to share?

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