Update IMAP build documentation.

Update the IMAP build documentation to show how to build on 64-bit
platforms.


(issue #16433)
Reported by: shrift
Tested by: lmadsen

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@234631 65c4cc65-6c06-0410-ace0-fbb531ad65f3

doc/tex/imapstorage.tex

@@ -52,6 +52,20 @@ Debian system there are two possibilities:
    \end{verbatim}
 \end{enumerate}
 
+Additionally, you may wish to build on a 64-bit machine, in which case you
+need to add -fPIC to EXTRACFLAGS. So, building on a 64-bit machine with
+SSL support would look something like:
+
+\begin{verbatim}
+   $ make slx EXTRACFLAGS="-fPIC -I/usr/include/openssl"
+\end{verbatim}
+
+Or without SSL support:
+
+\begin{verbatim}
+   $ make slx SSLTYPE=none EXTRACFLAGS=-fPIC
+\end{verbatim}
+
 Once this completes you can proceed with the Asterisk build; there is no
 need to run 'make install'.