doc: Fix pdflayout.sty to produce orgcard_letter.pdf correctly.

Thanks to David Niemi for the fix.

doc/pdflayout.sty

@@ -31,6 +31,7 @@
     \else\if1#1 % Letter
       \pdfpagewidth=8.5in
       \pdfpageheight=11in
+      \letterpaper=1
     \fi\fi
     \if l#2 % Landscape
       \edef\oldwidth{\the\pdfpagewidth}