Fix LaTeX and Beamer publishing process

* lisp/ox-beamer.el (org-beamer-publish-to-pdf):
* lisp/ox-latex.el (org-latex-publish-to-pdf): Ensure ".tex" file is
  generated in the same directory as the ".org" file.

Thanks to Rafael for reporting it.  See
http://permalink.gmane.org/gmane.emacs.orgmode/84095.

lisp/ox-beamer.el

@@ -1166,7 +1166,9 @@ Return output file name."
   ;; working directory and then moved to publishing directory.
   (org-publish-attachment
    plist
-   (org-latex-compile (org-publish-org-to 'beamer filename ".tex" plist))
+   (org-latex-compile
+    (org-publish-org-to
+     'beamer filename ".tex" plist (file-name-directory filename)))
    pub-dir))
 
 

lisp/ox-latex.el

@@ -2935,7 +2935,9 @@ Return output file name."
   ;; in working directory and then moved to publishing directory.
   (org-publish-attachment
    plist
-   (org-latex-compile (org-publish-org-to 'latex filename ".tex" plist))
+   (org-latex-compile
+    (org-publish-org-to
+     'latex filename ".tex" plist (file-name-directory filename)))
    pub-dir))