Install R support files.  Bump PKGREVISION.
GCC_REQD should be appended to, not set.

Fixes issues where a newer GCC has been chosen by the user but the GCC_REQD
was forcing an older (and broken) one to be pulled regardless.
Update misc/py-anita to 1.32.  Changes from 1.31:

Fix installation of source and debug sets, which had been broken since
the label displayed by sysinst was changed from "Source sets" to
"Source and debug sets".
Updated misc/py-anita to 1.32