Use patched version of pixman
We want to include https://gitlab.freedesktop.org/pixman/pixman/-/commit/eadb82866b0f6a326a61c36f60e5c2be8f7479af
Relevant upstream issue: https://gitlab.com/freedesktop-sdk/freedesktop-sdk/-/issues/1443
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We want to include https://gitlab.freedesktop.org/pixman/pixman/-/commit/eadb82866b0f6a326a61c36f60e5c2be8f7479af
Relevant upstream issue: https://gitlab.com/freedesktop-sdk/freedesktop-sdk/-/issues/1443