Hadrian Bindist: paths to haddock interfaces/html are wrong in the pkgconfs

They are relative to $(libdir), while they should be relative to $(ActualLibsDir)

wrong path:

haddock-interfaces: "${pkgroot}/../share/doc/ghc-9.3.20210928/html/libraries/array/array.haddock"

correct path:

haddock-interfaces:
    ${pkgroot}/../../../share/doc/ghc-9.3.20210928/html/libraries/array/array.haddock

Edited Sep 28, 2021 by Zubin

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