[CompilerSupportLibraries_jll] Add libssp as product on Windows

[giordano]

Background is https://discourse.julialang.org/t/glmakie-and-plots-fail-to-precompile-under-julia-1-8-4/92087. To summarise:

• libcairo requires libssp on Windows
• somehow, libssp-0.dll was loaded automatically when loading libllvm until julia v1.8.3, only on Windows; on macOS and Linux I don’t see libssp loaded at any point
• this doesn’t happen anymore with julia v1.8.4+, which means that libcairo can’t find libssp any longer on Windows, unless the directory where libssp is located is in PATH

This PR explicitly adds libssp to the products of CompilerSupportLibraries_jll on Windows so that we can ensure this library is loaded when CompilerSupportLibraries_jll is used.

[giordano]

My only question is: do this only on Windows (where it's currently needed) or everywhere (we may need libssp in the future, but it isn't available on Musl). @staticfloat @vchuravy opinions?

[jaakkor2]

Now libssp-0.dll is again loaded just before libLLVM-14jl.dll at startup.

julia> using Libdl
julia> filter!(lib -> occursin("libssp", lib), dllist())
1-element Vector{String}:
 "C:\\Users\\jaakkor2\\Downloads\\julia-06b157c4e9\\bin\\libssp-0.dll"

procmon filtered output https://gist.github.com/jaakkor2/736732a340b4c0d9692583ebead74c4e

[giordano]

Thanks for confirming it! I'm going to merge it now as-is, and if @staticfloat or someone else believes it'd be better to be more consistent across operating systems we can revise it for v1.9.

[staticfloat]

Yes, I think it would be best to do this consistently across OS's, where possible. :)