Log Message:
lang/racket-textual: Put back PKGNAME=racket-minimal-X.Y.

For some reason, the directory is called racket-textual but PKGNAME
is racket-minimal.  I'm guessing this happened for hysterical
raisins.  I inadvertently changed PKGNAME when tidying up; let's just
put it back, and worry about renaming the directory later.