Write aspect ratio when muxing gif.
Merge remote-tracking branch 'cehoyos/master'

* cehoyos/master:
  Write aspect ratio when muxing gif.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
hlsenc: added floating point time support.

Necessary for HLS version 3 and above.  Fixes ticket #3505.

Signed-off-by: Senthilnathan M <senthil.codr@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/hlsenc: remove unneeded l prefix from %lf

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>