resize.c: use estrdup(3) with basename(3)

basename(3) is invoked more than once on different paths. Retain the
correct name for the utility itself on error. Addresses PR bin/57355
from RVP, who prov

resize.c: use estrdup(3) with basename(3)

basename(3) is invoked more than once on different paths. Retain the
correct name for the utility itself on error. Addresses PR bin/57355
from RVP, who provided the patch.

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add parens

Add a maintainable version of resize, with a copy target and a header that
provides all the glue needed without other X headers.