docs/manual: Remove link to emdebian and replace with debian port page

In the list of full distribution, the FAQ contains a link to Emdebian.
This project stopped receiving updates in 2014 and the main web page does not exist anymore.
This replace the entry with a link to the Debian ports page.

Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit db2b8a1ce22e9ee458532d2900d4c8cbe96d9ba0)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

docs/manual/faq-troubleshooting.txt

@@ -45,7 +45,7 @@ distribution_ and you should opt for something like:
 
 * http://www.openembedded.org[openembedded]
 * https://www.yoctoproject.org[yocto]
-* http://www.emdebian.org[emdebian]
+* https://www.debian.org/ports/[Debian]
 * https://fedoraproject.org/wiki/Architectures[Fedora]
 * http://en.opensuse.org/Portal:ARM[openSUSE ARM]
 * http://archlinuxarm.org[Arch Linux ARM]