ftp/R-cran-curl: Fix test

The cran.mk add --no-vignettes option to 'R CMD check' and it causes
error at test.
The pdflatex:print/tex-formats dependency causes the --no-vignettes
isn't included to options (see Uses/Mk/cran.mk).
Without --no-manual option the whole print/texlive-texmf package is
required.