devel/hs-semialign: import hs-semialign-1.2.0.1

The major use of These of this is provided by the align member of Semialign
class, representing a generalized notion of "zipping with padding" that
combines structures without truncating to the size of the smaller input.

It turns out that zip operation fits well the Semialign class, forming
lattice-like structure.

(pho)