ox-latex: Remove -c argument from compilation with texi2dvi

* lisp/ox-latex.el (org-latex-pdf-process): This argument can cause
  problem with links with a relative path, since compilation happens
  in a different directory.

lisp/ox-latex.el

@@ -829,7 +829,7 @@ file name as its single argument."
 		  "xelatex -interaction nonstopmode -output-directory %o %f"
 		  "xelatex -interaction nonstopmode -output-directory %o %f"))
 	  (const :tag "texi2dvi"
-		 ("texi2dvi -p -b -c -V %f"))
+		 ("texi2dvi -p -b -V %f"))
 	  (const :tag "rubber"
 		 ("rubber -d --into %o %f"))
 	  (function)))