Make pigment and krita build with vc available
This copies the VcMacros.cmake and dependent files from Vc master. That resolves the INCLUDE_DIRECTORIES problem. It also adds -fabi flags to the PACKAGERS_BUILD macros, which resolves the build problem. When Vc 1.0 is released, we remove the cmake/vc folder and port to the new Vc. Thanks to Matthias Kretz, Alex Merry, Stepen Kelly, Elvis Stansvik for their help figuring out the issues!
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