firefox-l10n: Update download server
firefox-l10n: Update download server

The ftp mirror currently seems not to work, change to the download server
recommended here:
https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Source_Code/Downloading_Source_Archives

Signed-off-by: Max Krummenacher <727eb5a84a5364fd6bfe3d560338c42b03f29c33@gmail.com>
Signed-off-by: Otavio Salvador <1d31b11c1b92bf5d043d36edfe7174db39a6b891@ossystems.com.br>

linaro-home/meta-browser,rdm-dev/meta-browser,tobw/meta-browser,shr-distribution/meta-browser,hyunkim9123/meta-browser,twoerner/meta-browser,tobw/meta-browser,webdino/meta-browser,fbertux/meta-browser,rehsack/meta-browser,kraj/meta-browser,linaro-home/meta-browser,OSSystems/meta-browser,tobw/meta-browser,OSSystems/meta-browser,kraj/meta-browser,hyunkim9123/meta-browser,schnitzeltony/meta-browser,rehsack/meta-browser,shr-distribution/meta-browser,rdm-dev/meta-browser,linaro-home/meta-browser,webdino/meta-browser,kraj/meta-browser,linaro-home/meta-browser,webdino/meta-browser,twoerner/meta-browser,fbertux/meta-browser,rehsack/meta-browser,schnitzeltony/meta-browser,rdm-dev/meta-browser,tobw/meta-browser,shr-distribution/meta-browser,hyunkim9123/meta-browser,OSSystems/meta-browser,fbertux/meta-browser,Tarnyko/meta-browser,OSSystems/meta-browser,schnitzeltony/meta-browser,kraj/meta-browser,Tarnyko/meta-browser,rdm-dev/meta-browser,twoerner/meta-browser,schnitzeltony/meta-browser,fbertux/meta-browser,hyunkim9123/meta-browser,Tarnyko/meta-browser,fbertux/meta-browser,rehsack/meta-browser,rehsack/meta-browser,tobw/meta-browser,shr-distribution/meta-browser,Tarnyko/meta-browser,twoerner/meta-browser,Tarnyko/meta-browser,webdino/meta-browser,rdm-dev/meta-browser,hyunkim9123/meta-browser,linaro-home/meta-browser,webdino/meta-browser