Build FFmpeg #102

Job	Run time
Pre Checks	1s
Build base image	3m 30s
Build target base image (win64)	38s
Build target base image (win32)	1m 36s
Build target-variant image (win64, gpl)	3m 1s
Build target-variant image (win64, gpl 7.0)	3m 4s
Build target-variant image (win32, gpl)	3m 55s
Build target-variant image (win32, gpl 7.0)	4m 40s
Build ffmpeg (win64, gpl)	8m 42s
Build ffmpeg (win64, gpl 7.0)	9m 1s
Build ffmpeg (win32, gpl)	7m 39s
Build ffmpeg (win32, gpl 7.0)	8m 42s
Publish release	1m 2s
	55m 31s

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